# Math

-731/2 - 86 =?

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1. Is that
73 1/2 - 86?
or
731/2 - 86?

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2. -451.5

P arenthesis
E xponents
M ultiplication (left to right)
D ivision (left to right)
A ddition (left to right)
S ubtraction (left to right)

Since there's no parenthesis, exponents, or multiplication in this problem. You start with D in PEMDAS which is Divison.

So -731/2 which is -365.5

Since subtraction is the only thing left in the problem. We have to do this next.

So -365.5 - 86 which is -451.5

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3. 73 1/2 -86?

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4. Sorry I thought is was 731/2 - 86

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5. 86
- 73 1/2
__________

Change the 86 into an 85 and 2/2 so...

85 2/2
- 73 1/2
_________
12 1/2

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6. Line up the whole numbers and fractions on your homework sheet.

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7. Why did you change the 86 to a 85?

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8. Sonic changed 86 to 85 2/2 so that both the numerator and denominator have a fraction.

Think of a 86 pizzas. If you divide one pizza into halves you have 85 and 2/2 pizzas.

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9. Because 86 = 86 0/0 which 0/0 can't subtract 1/2

So if I change it to a 85 the 86 became of 2/2 which is 1 but we need it to be a 2/2 to subtract 1/2.

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