Question: Dinner costs $88.86. You add a 10% tip and pay $110.00. How much change?
Let's think step by step.
- Bill is 8886 cents.
- 10% tip = 8886 / 10 = 888.
- Total = 8886 + 888.
- 6 + 8 = 14 -> write 4, carry 1
- 8 + 8 + 1 = 17 -> write 7, carry 1
- 8 + 8 + 1 = 17 -> write 7, carry 1
- 8 + 0 + 1 = 9 -> write 9
- written: 4 7 7 9 -> answer 9774
- Change = 11000 - 9774.
- 11000 - 9774
- ones: 0 - 4 can't, borrow -> 10 - 4 = 6, write 6
- tens: 9 - 7 = 2, write 2
- hundreds: 9 - 7 = 2, write 2
- thousands: 0 - 9 can't, borrow -> 10 - 9 = 1, write 1
- ten-thousands: 0 - 0 = 0, write 0
- written: 6 2 2 1 0 -> answer 1226
Answer: $12.26


Question: What is 3 ft 1 in plus 4 ft 3 in?
Let's think step by step.
- Add inches: 1 + 3 = 4.
- Feet: 3 + 4 + 0 = 7.
Answer: 7 ft 4 in


Question: 'I have read 67 pages of this 200-page book.' 'I have read 20 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 67 + 20.
- 7 + 0 = 7 -> write 7
- 6 + 2 = 8 -> write 8
- written: 7 8 -> answer 87
- Pages left = 200 - 87.
- 200 - 87
- ones: 0 - 7 can't, borrow -> 10 - 7 = 3, write 3
- tens: 9 - 8 = 1, write 1
- hundreds: 1 - 0 = 1, write 1
- written: 3 1 1 -> answer 113
Answer: 113


Question: A garden is 11 meters by 7 meters. Fencing costs $2 per meter. How much to fence it?
Let's think step by step.
- Perimeter = 11 + 7 + 11 + 7.
- 1 + 7 = 8 -> write 8
- 1 + 0 = 1 -> write 1
- written: 8 1 -> answer 18
- 8 + 8 = 16 -> write 6, carry 1
- 1 + 1 + 1 = 3 -> write 3
- written: 6 3 -> answer 36
- Fence cost = 36 * 2.
- 36 * 2
- 6 * 2 = 12 -> write 2, carry 1
- 3 * 2 + 1 = 7 -> write 7
- written: 2 7 -> answer 72
Answer: $72


Question: What is 5 ft 2 in plus 1 ft 3 in?
Let's think step by step.
- Add inches: 2 + 3 = 5.
- Feet: 5 + 1 + 0 = 6.
Answer: 6 ft 5 in


Question: A bus leaves at 10:30. The ride takes 39 minutes and the walk home takes 11 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 39 + 11.
- 9 + 1 = 10 -> write 0, carry 1
- 3 + 1 + 1 = 5 -> write 5
- written: 0 5 -> answer 50
- Leave at 10:30. Add 50 minutes: 30 + 50 = 80 minutes.
- 80 is more than 60, so subtract 60: 80 - 60 = 20, and add 1 hour: 10 + 1 = 11.
Answer: 11:20


Question: Class A collected 627 cans and class B collected 379 cans. How many more did class A collect?
Let's think step by step.
- Difference = 627 - 379.
- 627 - 379
- ones: 7 - 9 can't, borrow -> 17 - 9 = 8, write 8
- tens: 1 - 7 can't, borrow -> 11 - 7 = 4, write 4
- hundreds: 5 - 3 = 2, write 2
- written: 8 4 2 -> answer 248
Answer: 248


Question: Class A collected 760 cans and class B collected 131 cans. How many more did class A collect?
Let's think step by step.
- Difference = 760 - 131.
- 760 - 131
- ones: 0 - 1 can't, borrow -> 10 - 1 = 9, write 9
- tens: 5 - 3 = 2, write 2
- hundreds: 7 - 1 = 6, write 6
- written: 9 2 6 -> answer 629
Answer: 629


Question: Class A collected 725 cans and class B collected 564 cans. How many more did class A collect?
Let's think step by step.
- Difference = 725 - 564.
- 725 - 564
- ones: 5 - 4 = 1, write 1
- tens: 2 - 6 can't, borrow -> 12 - 6 = 6, write 6
- hundreds: 6 - 5 = 1, write 1
- written: 1 6 1 -> answer 161
Answer: 161


Question: Dinner costs $24.89. You add a 10% tip and pay $40.00. How much change?
Let's think step by step.
- Bill is 2489 cents.
- 10% tip = 2489 / 10 = 248.
- Total = 2489 + 248.
- 9 + 8 = 17 -> write 7, carry 1
- 8 + 4 + 1 = 13 -> write 3, carry 1
- 4 + 2 + 1 = 7 -> write 7
- 2 + 0 = 2 -> write 2
- written: 7 3 7 2 -> answer 2737
- Change = 4000 - 2737.
- 4000 - 2737
- ones: 0 - 7 can't, borrow -> 10 - 7 = 3, write 3
- tens: 9 - 3 = 6, write 6
- hundreds: 9 - 7 = 2, write 2
- thousands: 3 - 2 = 1, write 1
- written: 3 6 2 1 -> answer 1263
Answer: $12.63


Question: 'I have read 54 pages of this 200-page book.' 'I have read 87 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 54 + 87.
- 4 + 7 = 11 -> write 1, carry 1
- 5 + 8 + 1 = 14 -> write 4, carry 1
- carry 1 -> write 1
- written: 1 4 1 -> answer 141
- Pages left = 200 - 141.
- 200 - 141
- ones: 0 - 1 can't, borrow -> 10 - 1 = 9, write 9
- tens: 9 - 4 = 5, write 5
- hundreds: 1 - 1 = 0, write 0
- written: 9 5 0 -> answer 59
Answer: 59


Question: A bus leaves at 10:34. The ride takes 37 minutes and the walk home takes 9 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 37 + 9.
- 7 + 9 = 16 -> write 6, carry 1
- 3 + 0 + 1 = 4 -> write 4
- written: 6 4 -> answer 46
- Leave at 10:34. Add 46 minutes: 34 + 46 = 80 minutes.
- 80 is more than 60, so subtract 60: 80 - 60 = 20, and add 1 hour: 10 + 1 = 11.
Answer: 11:20


Question: A bus leaves at 10:14. The ride takes 26 minutes and the walk home takes 14 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 26 + 14.
- 6 + 4 = 10 -> write 0, carry 1
- 2 + 1 + 1 = 4 -> write 4
- written: 0 4 -> answer 40
- Leave at 10:14. Add 40 minutes: 14 + 40 = 54 minutes.
Answer: 10:54


Question: A bus leaves at 8:18. The ride takes 40 minutes and the walk home takes 8 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 40 + 8.
- 0 + 8 = 8 -> write 8
- 4 + 0 = 4 -> write 4
- written: 8 4 -> answer 48
- Leave at 8:18. Add 48 minutes: 18 + 48 = 66 minutes.
- 66 is more than 60, so subtract 60: 66 - 60 = 6, and add 1 hour: 8 + 1 = 9.
Answer: 9:06


Question: Class A collected 348 cans and class B collected 323 cans. How many more did class A collect?
Let's think step by step.
- Difference = 348 - 323.
- 348 - 323
- ones: 8 - 3 = 5, write 5
- tens: 4 - 2 = 2, write 2
- hundreds: 3 - 3 = 0, write 0
- written: 5 2 0 -> answer 25
Answer: 25


Question: 'I have read 68 pages of this 300-page book.' 'I have read 73 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 68 + 73.
- 8 + 3 = 11 -> write 1, carry 1
- 6 + 7 + 1 = 14 -> write 4, carry 1
- carry 1 -> write 1
- written: 1 4 1 -> answer 141
- Pages left = 300 - 141.
- 300 - 141
- ones: 0 - 1 can't, borrow -> 10 - 1 = 9, write 9
- tens: 9 - 4 = 5, write 5
- hundreds: 2 - 1 = 1, write 1
- written: 9 5 1 -> answer 159
Answer: 159


Question: A bus leaves at 10:31. The ride takes 31 minutes and the walk home takes 10 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 31 + 10.
- 1 + 0 = 1 -> write 1
- 3 + 1 = 4 -> write 4
- written: 1 4 -> answer 41
- Leave at 10:31. Add 41 minutes: 31 + 41 = 72 minutes.
- 72 is more than 60, so subtract 60: 72 - 60 = 12, and add 1 hour: 10 + 1 = 11.
Answer: 11:12


Question: Class A collected 285 cans and class B collected 144 cans. How many more did class A collect?
Let's think step by step.
- Difference = 285 - 144.
- 285 - 144
- ones: 5 - 4 = 1, write 1
- tens: 8 - 4 = 4, write 4
- hundreds: 2 - 1 = 1, write 1
- written: 1 4 1 -> answer 141
Answer: 141


Question: Class A collected 771 cans and class B collected 204 cans. How many more did class A collect?
Let's think step by step.
- Difference = 771 - 204.
- 771 - 204
- ones: 1 - 4 can't, borrow -> 11 - 4 = 7, write 7
- tens: 6 - 0 = 6, write 6
- hundreds: 7 - 2 = 5, write 5
- written: 7 6 5 -> answer 567
Answer: 567


Question: A bus leaves at 9:34. The ride takes 25 minutes and the walk home takes 14 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 25 + 14.
- 5 + 4 = 9 -> write 9
- 2 + 1 = 3 -> write 3
- written: 9 3 -> answer 39
- Leave at 9:34. Add 39 minutes: 34 + 39 = 73 minutes.
- 73 is more than 60, so subtract 60: 73 - 60 = 13, and add 1 hour: 9 + 1 = 10.
Answer: 10:13


Question: Class A collected 317 cans and class B collected 158 cans. How many more did class A collect?
Let's think step by step.
- Difference = 317 - 158.
- 317 - 158
- ones: 7 - 8 can't, borrow -> 17 - 8 = 9, write 9
- tens: 0 - 5 can't, borrow -> 10 - 5 = 5, write 5
- hundreds: 2 - 1 = 1, write 1
- written: 9 5 1 -> answer 159
Answer: 159


Question: Dinner costs $43.33. You add a 15% tip and pay $60.00. How much change?
Let's think step by step.
- Bill is 4333 cents.
- 10% = 433; half of that is 216; tip = 433 + 216 = 649.
- Total = 4333 + 649.
- 3 + 9 = 12 -> write 2, carry 1
- 3 + 4 + 1 = 8 -> write 8
- 3 + 6 = 9 -> write 9
- 4 + 0 = 4 -> write 4
- written: 2 8 9 4 -> answer 4982
- Change = 6000 - 4982.
- 6000 - 4982
- ones: 0 - 2 can't, borrow -> 10 - 2 = 8, write 8
- tens: 9 - 8 = 1, write 1
- hundreds: 9 - 9 = 0, write 0
- thousands: 5 - 4 = 1, write 1
- written: 8 1 0 1 -> answer 1018
Answer: $10.18


Question: Dinner costs $54.64. You add a 15% tip and pay $80.00. How much change?
Let's think step by step.
- Bill is 5464 cents.
- 10% = 546; half of that is 273; tip = 546 + 273 = 819.
- Total = 5464 + 819.
- 4 + 9 = 13 -> write 3, carry 1
- 6 + 1 + 1 = 8 -> write 8
- 4 + 8 = 12 -> write 2, carry 1
- 5 + 0 + 1 = 6 -> write 6
- written: 3 8 2 6 -> answer 6283
- Change = 8000 - 6283.
- 8000 - 6283
- ones: 0 - 3 can't, borrow -> 10 - 3 = 7, write 7
- tens: 9 - 8 = 1, write 1
- hundreds: 9 - 2 = 7, write 7
- thousands: 7 - 6 = 1, write 1
- written: 7 1 7 1 -> answer 1717
Answer: $17.17


Question: A car drives 46 miles per hour for 2 hours. How far does it travel?
Let's think step by step.
- Distance = speed * time = 46 * 2.
- 46 * 2
- 6 * 2 = 12 -> write 2, carry 1
- 4 * 2 + 1 = 9 -> write 9
- written: 2 9 -> answer 92
Answer: 92 miles


Question: You get $30.00 allowance, spend $14.57 on lunch and $8.01 on a gift, then buy a $9.46 game. How much is left?
Let's think step by step.
- Allowance in cents: 3000. First purchase: 1457.
- 3000 - 1457
- ones: 0 - 7 can't, borrow -> 10 - 7 = 3, write 3
- tens: 9 - 5 = 4, write 4
- hundreds: 9 - 4 = 5, write 5
- thousands: 2 - 1 = 1, write 1
- written: 3 4 5 1 -> answer 1543
- Second purchase: 801.
- 1543 - 801
- ones: 3 - 1 = 2, write 2
- tens: 4 - 0 = 4, write 4
- hundreds: 5 - 8 can't, borrow -> 15 - 8 = 7, write 7
- thousands: 0 - 0 = 0, write 0
- written: 2 4 7 0 -> answer 742
- The game costs 946, which is more than 742.
Answer: not enough money


Question: Class A collected 676 cans and class B collected 187 cans. How many more did class A collect?
Let's think step by step.
- Difference = 676 - 187.
- 676 - 187
- ones: 6 - 7 can't, borrow -> 16 - 7 = 9, write 9
- tens: 6 - 8 can't, borrow -> 16 - 8 = 8, write 8
- hundreds: 5 - 1 = 4, write 4
- written: 9 8 4 -> answer 489
Answer: 489


Question: What is 3 ft 1 in plus 4 ft 8 in?
Let's think step by step.
- Add inches: 1 + 8 = 9.
- Feet: 3 + 4 + 0 = 7.
Answer: 7 ft 9 in


Question: 'I have read 68 pages of this 250-page book.' 'I have read 70 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 68 + 70.
- 8 + 0 = 8 -> write 8
- 6 + 7 = 13 -> write 3, carry 1
- carry 1 -> write 1
- written: 8 3 1 -> answer 138
- Pages left = 250 - 138.
- 250 - 138
- ones: 0 - 8 can't, borrow -> 10 - 8 = 2, write 2
- tens: 4 - 3 = 1, write 1
- hundreds: 2 - 1 = 1, write 1
- written: 2 1 1 -> answer 112
Answer: 112


Question: Class A collected 676 cans and class B collected 467 cans. How many more did class A collect?
Let's think step by step.
- Difference = 676 - 467.
- 676 - 467
- ones: 6 - 7 can't, borrow -> 16 - 7 = 9, write 9
- tens: 6 - 6 = 0, write 0
- hundreds: 6 - 4 = 2, write 2
- written: 9 0 2 -> answer 209
Answer: 209


Question: Class A collected 681 cans and class B collected 416 cans. How many more did class A collect?
Let's think step by step.
- Difference = 681 - 416.
- 681 - 416
- ones: 1 - 6 can't, borrow -> 11 - 6 = 5, write 5
- tens: 7 - 1 = 6, write 6
- hundreds: 6 - 4 = 2, write 2
- written: 5 6 2 -> answer 265
Answer: 265


Question: 'I have read 65 pages of this 250-page book.' 'I have read 34 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 65 + 34.
- 5 + 4 = 9 -> write 9
- 6 + 3 = 9 -> write 9
- written: 9 9 -> answer 99
- Pages left = 250 - 99.
- 250 - 99
- ones: 0 - 9 can't, borrow -> 10 - 9 = 1, write 1
- tens: 4 - 9 can't, borrow -> 14 - 9 = 5, write 5
- hundreds: 1 - 0 = 1, write 1
- written: 1 5 1 -> answer 151
Answer: 151


Question: A bus leaves at 8:09. The ride takes 30 minutes and the walk home takes 8 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 30 + 8.
- 0 + 8 = 8 -> write 8
- 3 + 0 = 3 -> write 3
- written: 8 3 -> answer 38
- Leave at 8:09. Add 38 minutes: 9 + 38 = 47 minutes.
Answer: 8:47


Question: 'I have read 65 pages of this 300-page book.' 'I have read 59 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 65 + 59.
- 5 + 9 = 14 -> write 4, carry 1
- 6 + 5 + 1 = 12 -> write 2, carry 1
- carry 1 -> write 1
- written: 4 2 1 -> answer 124
- Pages left = 300 - 124.
- 300 - 124
- ones: 0 - 4 can't, borrow -> 10 - 4 = 6, write 6
- tens: 9 - 2 = 7, write 7
- hundreds: 2 - 1 = 1, write 1
- written: 6 7 1 -> answer 176
Answer: 176


Question: Dinner costs $78.59. You add a 15% tip and pay $110.00. How much change?
Let's think step by step.
- Bill is 7859 cents.
- 10% = 785; half of that is 392; tip = 785 + 392 = 1177.
- Total = 7859 + 1177.
- 9 + 7 = 16 -> write 6, carry 1
- 5 + 7 + 1 = 13 -> write 3, carry 1
- 8 + 1 + 1 = 10 -> write 0, carry 1
- 7 + 1 + 1 = 9 -> write 9
- written: 6 3 0 9 -> answer 9036
- Change = 11000 - 9036.
- 11000 - 9036
- ones: 0 - 6 can't, borrow -> 10 - 6 = 4, write 4
- tens: 9 - 3 = 6, write 6
- hundreds: 9 - 0 = 9, write 9
- thousands: 0 - 9 can't, borrow -> 10 - 9 = 1, write 1
- ten-thousands: 0 - 0 = 0, write 0
- written: 4 6 9 1 0 -> answer 1964
Answer: $19.64


Question: What is 3 ft 6 in plus 4 ft 1 in?
Let's think step by step.
- Add inches: 6 + 1 = 7.
- Feet: 3 + 4 + 0 = 7.
Answer: 7 ft 7 in


Question: You get $30.00 allowance, spend $10.29 on lunch and $5.21 on a gift, then buy a $14.97 game. How much is left?
Let's think step by step.
- Allowance in cents: 3000. First purchase: 1029.
- 3000 - 1029
- ones: 0 - 9 can't, borrow -> 10 - 9 = 1, write 1
- tens: 9 - 2 = 7, write 7
- hundreds: 9 - 0 = 9, write 9
- thousands: 2 - 1 = 1, write 1
- written: 1 7 9 1 -> answer 1971
- Second purchase: 521.
- 1971 - 521
- ones: 1 - 1 = 0, write 0
- tens: 7 - 2 = 5, write 5
- hundreds: 9 - 5 = 4, write 4
- thousands: 1 - 0 = 1, write 1
- written: 0 5 4 1 -> answer 1450
- The game costs 1497, which is more than 1450.
Answer: not enough money


Question: Class A collected 489 cans and class B collected 477 cans. How many more did class A collect?
Let's think step by step.
- Difference = 489 - 477.
- 489 - 477
- ones: 9 - 7 = 2, write 2
- tens: 8 - 7 = 1, write 1
- hundreds: 4 - 4 = 0, write 0
- written: 2 1 0 -> answer 12
Answer: 12


Question: 'I have read 78 pages of this 200-page book.' 'I have read 22 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 78 + 22.
- 8 + 2 = 10 -> write 0, carry 1
- 7 + 2 + 1 = 10 -> write 0, carry 1
- carry 1 -> write 1
- written: 0 0 1 -> answer 100
- Pages left = 200 - 100.
- 200 - 100
- ones: 0 - 0 = 0, write 0
- tens: 0 - 0 = 0, write 0
- hundreds: 2 - 1 = 1, write 1
- written: 0 0 1 -> answer 100
Answer: 100


Question: Dinner costs $64.52. You add a 15% tip and pay $90.00. How much change?
Let's think step by step.
- Bill is 6452 cents.
- 10% = 645; half of that is 322; tip = 645 + 322 = 967.
- Total = 6452 + 967.
- 2 + 7 = 9 -> write 9
- 5 + 6 = 11 -> write 1, carry 1
- 4 + 9 + 1 = 14 -> write 4, carry 1
- 6 + 0 + 1 = 7 -> write 7
- written: 9 1 4 7 -> answer 7419
- Change = 9000 - 7419.
- 9000 - 7419
- ones: 0 - 9 can't, borrow -> 10 - 9 = 1, write 1
- tens: 9 - 1 = 8, write 8
- hundreds: 9 - 4 = 5, write 5
- thousands: 8 - 7 = 1, write 1
- written: 1 8 5 1 -> answer 1581
Answer: $15.81


Question: Dinner costs $85.26. You add a 10% tip and pay $110.00. How much change?
Let's think step by step.
- Bill is 8526 cents.
- 10% tip = 8526 / 10 = 852.
- Total = 8526 + 852.
- 6 + 2 = 8 -> write 8
- 2 + 5 = 7 -> write 7
- 5 + 8 = 13 -> write 3, carry 1
- 8 + 0 + 1 = 9 -> write 9
- written: 8 7 3 9 -> answer 9378
- Change = 11000 - 9378.
- 11000 - 9378
- ones: 0 - 8 can't, borrow -> 10 - 8 = 2, write 2
- tens: 9 - 7 = 2, write 2
- hundreds: 9 - 3 = 6, write 6
- thousands: 0 - 9 can't, borrow -> 10 - 9 = 1, write 1
- ten-thousands: 0 - 0 = 0, write 0
- written: 2 2 6 1 0 -> answer 1622
Answer: $16.22


Question: Dinner costs $49.51. You add a 10% tip and pay $70.00. How much change?
Let's think step by step.
- Bill is 4951 cents.
- 10% tip = 4951 / 10 = 495.
- Total = 4951 + 495.
- 1 + 5 = 6 -> write 6
- 5 + 9 = 14 -> write 4, carry 1
- 9 + 4 + 1 = 14 -> write 4, carry 1
- 4 + 0 + 1 = 5 -> write 5
- written: 6 4 4 5 -> answer 5446
- Change = 7000 - 5446.
- 7000 - 5446
- ones: 0 - 6 can't, borrow -> 10 - 6 = 4, write 4
- tens: 9 - 4 = 5, write 5
- hundreds: 9 - 4 = 5, write 5
- thousands: 6 - 5 = 1, write 1
- written: 4 5 5 1 -> answer 1554
Answer: $15.54


Question: 'I have read 37 pages of this 200-page book.' 'I have read 74 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 37 + 74.
- 7 + 4 = 11 -> write 1, carry 1
- 3 + 7 + 1 = 11 -> write 1, carry 1
- carry 1 -> write 1
- written: 1 1 1 -> answer 111
- Pages left = 200 - 111.
- 200 - 111
- ones: 0 - 1 can't, borrow -> 10 - 1 = 9, write 9
- tens: 9 - 1 = 8, write 8
- hundreds: 1 - 1 = 0, write 0
- written: 9 8 0 -> answer 89
Answer: 89


Question: You get $20.00 allowance, spend $3.91 on lunch and $3.61 on a gift, then buy a $12.94 game. How much is left?
Let's think step by step.
- Allowance in cents: 2000. First purchase: 391.
- 2000 - 391
- ones: 0 - 1 can't, borrow -> 10 - 1 = 9, write 9
- tens: 9 - 9 = 0, write 0
- hundreds: 9 - 3 = 6, write 6
- thousands: 1 - 0 = 1, write 1
- written: 9 0 6 1 -> answer 1609
- Second purchase: 361.
- 1609 - 361
- ones: 9 - 1 = 8, write 8
- tens: 0 - 6 can't, borrow -> 10 - 6 = 4, write 4
- hundreds: 5 - 3 = 2, write 2
- thousands: 1 - 0 = 1, write 1
- written: 8 4 2 1 -> answer 1248
- The game costs 1294, which is more than 1248.
Answer: not enough money


Question: Dinner costs $34.27. You add a 15% tip and pay $50.00. How much change?
Let's think step by step.
- Bill is 3427 cents.
- 10% = 342; half of that is 171; tip = 342 + 171 = 513.
- Total = 3427 + 513.
- 7 + 3 = 10 -> write 0, carry 1
- 2 + 1 + 1 = 4 -> write 4
- 4 + 5 = 9 -> write 9
- 3 + 0 = 3 -> write 3
- written: 0 4 9 3 -> answer 3940
- Change = 5000 - 3940.
- 5000 - 3940
- ones: 0 - 0 = 0, write 0
- tens: 0 - 4 can't, borrow -> 10 - 4 = 6, write 6
- hundreds: 9 - 9 = 0, write 0
- thousands: 4 - 3 = 1, write 1
- written: 0 6 0 1 -> answer 1060
Answer: $10.60


Question: A bus leaves at 10:31. The ride takes 21 minutes and the walk home takes 12 minutes. What time do you arrive?
Let's think step by step.
- Total travel minutes = 21 + 12.
- 1 + 2 = 3 -> write 3
- 2 + 1 = 3 -> write 3
- written: 3 3 -> answer 33
- Leave at 10:31. Add 33 minutes: 31 + 33 = 64 minutes.
- 64 is more than 60, so subtract 60: 64 - 60 = 4, and add 1 hour: 10 + 1 = 11.
Answer: 11:04


Question: 'I have read 65 pages of this 250-page book.' 'I have read 74 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 65 + 74.
- 5 + 4 = 9 -> write 9
- 6 + 7 = 13 -> write 3, carry 1
- carry 1 -> write 1
- written: 9 3 1 -> answer 139
- Pages left = 250 - 139.
- 250 - 139
- ones: 0 - 9 can't, borrow -> 10 - 9 = 1, write 1
- tens: 4 - 3 = 1, write 1
- hundreds: 2 - 1 = 1, write 1
- written: 1 1 1 -> answer 111
Answer: 111


Question: 'I have read 37 pages of this 250-page book.' 'I have read 55 pages.' How many pages have they not read between them?
Let's think step by step.
- Pages read together = 37 + 55.
- 7 + 5 = 12 -> write 2, carry 1
- 3 + 5 + 1 = 9 -> write 9
- written: 2 9 -> answer 92
- Pages left = 250 - 92.
- 250 - 92
- ones: 0 - 2 can't, borrow -> 10 - 2 = 8, write 8
- tens: 4 - 9 can't, borrow -> 14 - 9 = 5, write 5
- hundreds: 1 - 0 = 1, write 1
- written: 8 5 1 -> answer 158
Answer: 158


Question: Dinner costs $67.15. You add a 10% tip and pay $90.00. How much change?
Let's think step by step.
- Bill is 6715 cents.
- 10% tip = 6715 / 10 = 671.
- Total = 6715 + 671.
- 5 + 1 = 6 -> write 6
- 1 + 7 = 8 -> write 8
- 7 + 6 = 13 -> write 3, carry 1
- 6 + 0 + 1 = 7 -> write 7
- written: 6 8 3 7 -> answer 7386
- Change = 9000 - 7386.
- 9000 - 7386
- ones: 0 - 6 can't, borrow -> 10 - 6 = 4, write 4
- tens: 9 - 8 = 1, write 1
- hundreds: 9 - 3 = 6, write 6
- thousands: 8 - 7 = 1, write 1
- written: 4 1 6 1 -> answer 1614
Answer: $16.14