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MathEd-PII

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volunteer
That will be grand
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student
There's the question
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volunteer
There's the question, isn't it? Let me have a look now for it. Is it on the board?
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volunteer
Oh yeah, yeah, it's just about loading for me now. Thank you.
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volunteer
I'm gonna scroll up
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volunteer
Mhm
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volunteer
Lovely. So, um,
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volunteer
Michael, I'm gonna ask you, um, did I say Alex? Emily, sorry, but could you read out the question for us, please. Thank you.
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[ { "pii_type": "PERSON", "surrogate": "Michael", "start": 0, "end": 7 }, { "pii_type": "PERSON", "surrogate": "Alex", "start": 42, "end": 46 }, { "pii_type": "PERSON", "surrogate": "Emily", "start": 48, "end": 53 } ]
student
Oh, OK then. So one use the expression 6-9-12 + 22 defining his profit for days 2 and 3. He rewrote the expression as 16 + 9 + 12 + 22. he can use the associative in the community of properties where we write the expression again. Explain why he had to use out of an inverse before she could use these properties.
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volunteer
OK
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volunteer
Um, so you're not really asked to do an answer, but just to explain the answer then.
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student
Yes, so we have a hard time.
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volunteer
Yeah, I'll check, yeah.
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volunteer
Do you have a heart
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student
I have a hard time explaining the answer.
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volunteer
I'll explain you so good, good, good.
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volunteer
All right. Do you have any, uh, notes on this topic that you'll teacher's been going through with you?
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student
Yes.
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volunteer
OK. Would you mind, would you like to just read us out a portion of that, just the part that's connected to the question not only.
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student
Uh, OK. So the additive property is subtraction and community of property, A + B equals B + A 5 minus 44 minus 51 it's not equal one, but 5 plus 4 plus 4 + 5 equals 1 equals 1.
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volunteer
Oh
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student
And so, yes.
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volunteer
That's really a lot of notes you've been taking down. Well done, um, Michael.
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[ { "pii_type": "PERSON", "surrogate": "Michael", "start": 69, "end": 76 } ]
student
Yeah
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volunteer
OK. So
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volunteer
OK, so
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volunteer
what was the
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volunteer
additive inverse that was used in this question. Could you give us one of the examples of an additive inverse in this question.
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student
Um, so like I didn't she's basically just the opposite of just the opposite of a, of a quest of a question like example.
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volunteer
of a value
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student
6 minus 9 equals 6 + -9.
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volunteer
Yes, yes, good. So that's a good example. Yeah, could you use the question itself then to give us another example of an additive inverse now
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student
OK, yeah, so 9 minus 12 equals we, what they're getting 9 plus.
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volunteer
So
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volunteer
uh.
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volunteer
Instead of saying
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volunteer
16
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volunteer
add
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volunteer
a 9
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volunteer
Is that right? You need to use 16, add the negative inverse of 9.
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student
It's just an example
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volunteer
Oh, we, we had the connection timed out for a bit. So I can just about hear you. You were saying, what's the example again?
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student
The example 16 minus 9 equals 16 + -9.
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volunteer
Yes. So, you have used
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volunteer
an inverse of 9, which is -9.
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volunteer
Yeah.
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student
Yes
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volunteer
And why did it, yeah, that's it. So you've got the answer. Why didn't he use just uh straightforward 9, and he
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volunteer
um, to do the quest to to get the expression correct? Why did he have to use, um, the neck, the, the negative of 9 or in at the inverse of 9 instead of straightforward and a 9 on its own.
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student
Um brex and best sense and yeah.
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volunteer
because that's what they want to know
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volunteer
Oh, OK
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student
is because it was like, it would sound confusing for the question and plus, so they would have to simplify
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student
in order for it to fit the actual question.
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volunteer
Mm.
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volunteer
Yes, in a sense, um, what's the meaning of the word inverse?
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volunteer
Michael
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[ { "pii_type": "PERSON", "surrogate": "Michael", "start": 0, "end": 7 } ]
student
like the opposite of something.
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volunteer
Yes. So, what's the inverse of
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volunteer
uh, profits that you make.
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volunteer
What's the
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volunteer
reverse or the inverse of a prophet.
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student
He reversed, she's like the debt.
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volunteer
Prophet
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student
OK
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volunteer
A debt, that's good. Debt. So they're saying that if you had
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volunteer
written + 9 that would be referring to
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volunteer
a prophet
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volunteer
not a debt
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student
Oh no
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volunteer
because you need to show, yes.
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student
Yeah, I, I know now.
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student
Because you need to show a
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volunteer
You got it, yeah. You, you, you need to show that
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volunteer
a that, that, that's it, that's it.
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volunteer
which is the inverse of a profit. Is that right?
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student
Yes.
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volunteer
Yeah, that's the reason for the negativity. That's the reason negativity so coming up or the additive inverses we need.
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volunteer
Don't add on
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student
I'm not back yet. Oh, because of you.
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volunteer
Yes
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volunteer
If you didn't, if you use um the number without
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volunteer
the um inverse sign. We're talking about a profit, and we don't want to be talking about a profit for those values. We want to talk about that, debt or a loss.
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volunteer
Yay. So, you got that one right?
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volunteer
Brick.
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volunteer
Right.
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student
Yes
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volunteer
Oh, that's lovely. Uh, can you tell us, uh, have you got any other questions apart from this one? You, you can, OK, can you go back over how, how do you explain the answer? Why didn't he have to use an additive inverse, instead of a straightforward value, um, positive value.
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student
Now that's gonna get you and it's just the same way.
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volunteer
You're looking.
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student
Oh sorry, um, sorry, David, it's because, um, uh, it's because like it's supposed to represent dead and not like an increase in that you.
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[ { "pii_type": "PERSON", "surrogate": "David", "start": 21, "end": 26 } ]
student
I like the same value.
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volunteer
That's correct.
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volunteer
Yeah, yeah, because if you'd use the same sign, it would have meant you were talking about a prophet, not a debt or a loss. That's the reason. Because you need to use an inverse
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volunteer
on opposite sign to show that you're talking about that. True.
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student
OK
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volunteer
OK, let's
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volunteer
Well done, well done, Michael. Great work from you here today.
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[ { "pii_type": "PERSON", "surrogate": "Michael", "start": 22, "end": 29 } ]
volunteer
Yeah
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volunteer
And um
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