Grade 7 Integer Review

Integers can be represented with a number lines or integer chips.

integers are usualy represented with two colors red and blueNegative - Blue

Positive - Red

Zero Pairs - a pair of negative and positive numbers and the sum is zero.

ex. (-3) + (+3) = 0.

This is a rhyme you should sing to yourself during a test if you can't remember when to use a zero pair.

When subtracting something that isnt there, use a zero pair.

In grade 7 we did integers like this

(-3)+(+7)= the thing about doing integer in grade 7 is there is brackets.

Here are some questions:

13. a)(+4)x(+6)=24

d)( -8)x(-2)=16

Chapter 2

multiplying integers

Here are some questions we did.

10. a(17)x(-24)= -408

b(34)x(22)=56

For a multyplycation question that needs a zero pair you can see 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

1.6÷2=3

6 groups of 2

2. 3÷2=1.5

3 groups of 2

If you know the number that is in each group, but you dont know the number of groups then that is quotative division.

1.(-6)÷(2)= -3

another way to mutiply intgers is multiplicated-inverse

-2÷-3

-3÷-2

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

-In a divison question with an odd amount of negative signs the quotient will be negative

Chapter 4

Order of operation with integers

**(+5) x (-3) + (-6) / (+3) =**

To do order of opration u won't to follow the rules of B.E.D.M.A.S. Brackets, Exponents( except there are no exponents in bedmas) , Division, Multiplication, Addition, Subtraction.

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 doing anything else.

1.-6-9+10-1= -6