Multiplying by Multiples of 10

What is the product for 20 x 9 ?

• 18

• 160

• 180

• 16

80 x 7 =

• 56

• 640

• 490

• 560

? x 6 = 240

• 30

• 50

• 40

• 20

What basic fact helps me solve 70 x 9?

• 7 x 9

• 7 x 8

• 9 x 8

• 9 x 9

What is the Associative Property?

• Numbers can be multiplied in any order.

• Numbers can be grouped differently without changing the product.

• Numbers multiplied by zero all equal 0.

• Numbers multiplied by 1 equal the other number.