Lesson 3: MULTIPLYING and DIVIDING Integers

DO NOW

Evaluate the following expressions on scratch paper without a calculator:

8 * 5 =
6 * -6 =
-9 * 3 =
-7 * -9 =

DO NOW

Evaluate the following expressions on scratch paper without a calculator:

4 * 6 =
4 * -6 =
-5 * 3 =
-5 * -3 =

LEARNING TARGET

I can multiply and divide integers ... even negative ones!

I DO

What are the rules for multiplication and division of two integers?

If the two integers have the same sign, the answer is positive
If the two integers have different signs, the answer is negative

Let's do some examples:

-3 * -4 =
-3 * 4 =
5 * 10 =
-8 / 2 =
4 / -4 =
3 * -5 =
(-8 / 2) =

WE DO

Get out your telepathy machines!

YOU DO

Complete these problems for a 3

Complete these problems for a 4

Complete these problems for a 5

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Lesson 3: MULTIPLYING and DIVIDING Integers

DO NOW

Evaluate the following expressions on scratch paper without a calculator:

8 * 5 =

6 * -6 =

-9 * 3 =

-7 * -9 =

DO NOW

Evaluate the following expressions on scratch paper without a calculator:

4 * 6 =

4 * -6 =

-5 * 3 =

-5 * -3 =

LEARNING TARGET

I can multiply and divide integers ... even negative ones!

I DO

What are the rules for multiplication and division of two integers?

If the two integers have the same sign, the answer is positive

If the two integers have different signs, the answer is negative

Let's do some examples:

-3 * -4 =

-3 * 4 =

5 * 10 =

-8 / 2 =

4 / -4 =

3 * -5 =

(-8 / 2) =

WE DO

Get out your telepathy machines!

YOU DO

Complete these problems for a 3