## Friday, March 11, 2011

### Ana Lopena's Great Big Book Of Intergers

Chapter 1

Integers can be represented with number lines or integer chips.
negative- blue
positive - red

zero pairs- a pair of negative and positive numbers whose sum is 0.
ex. (-8) + (+8) = 0, (-20) + (+20) = 0
Here is a song to help you remember when to use a zero pair- *When subtracting something that isn't there use a zero pair!*

This is how we wrote integers in grade seven

Here are some questions that we did.

Chapter 2

Multiplying Integers

Here we learned how to multiply integers, here are some questions that we did.

For questions needing a zero pair you can find out how many zero pairs you need by multiplying the two factors in the question without their negative or positive signs.
ex. (-2) x (+3) - 2 x 3 = 6
6 zero pairs

Chapter 3

Dividing Integers

Partitive Division or Groups of
If you know the number of groups, but you don't know the number in each group then that is partitive division.

Quotative Division

If you know the number that is in each group, but you don't know the number of groups then that is quotative division.

You can also find the answer to a division question using multiplicated inverse-

In a division question with an even amount or no (-) signs the quotient will be positive.
In a division question with an odd number of negative signs the quotient will be negative.

Chapter 4

Order of Operations with Integers

(+5) x (-3) + (-6) ÷ (+3)=

To answer this question you will need to follow the rules of B.E.D.M.A.S.
Brackets, Exponents, Division, Multiplication, Adding, Subtracting

First add square brackets around the expressions with a x or ÷ to help remind you to answer them first. The square brackets means that you should answer the question in them before you do anything else.

Now answer, and write it in a new line on your paper.

Now all that you have to do is answer it.