Multiplying Integers. Warm Up 1.9 x 3 =5. 6 x 9 = 2.7 x 10 =6. 10 x 23 = 3.9 x 8 =7. 9 x 9 = 4.15 x 10 =8. 10 x 20 =

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Presentation transcript:

Multiplying Integers

Warm Up 1.9 x 3 =5. 6 x 9 = 2.7 x 10 =6. 10 x 23 = 3.9 x 8 =7. 9 x 9 = 4.15 x 10 =8. 10 x 20 =

Multiplying Integers Using a Number Line You can use a number line to see what happens when you multiply integers.

What do you notice about the product of two integers with different signs?

Modeling Integer Multiplication Counters representing positive and negative numbers can help you understand how to find the product of two negative integers. + –

What do you notice about the sign of the product of two negative integers? What can you conclude about the sign of the product of two integers with the same sign?

Compare the rules for finding a product of a number and zero and finding the sum of a number and zero. a x 0 = 0 a + 0 = a

Find Each Product 1.-3(5) 2.(-10)(-2) 3.0(-22) 4.8(4)