**Multiply and Divide by Multiples 10**

**Multiply and Divide by Multiples 10**

Multiples of 10, 100, 1,000

**Multiply by Multiples 10**

Multiply the whole numbers in each. Add as many zeros as

there are in the factors to the product.

Example: 40 x 90 = ?

Multiply the whole numbers ( 4 x 9 = 36

Add the zeros to the 36 (3600**answer: 40 x 90 = 3,600**

**Divide by Multiples 10**

Divide the front digits and write the quotient.

Cross out the zeros that match up from both numbers.

Example: 3,500 ÷ 70

1: Rewrite the dividend and divisor using multiples of 10

3,500 = 350 x 10 and 70 = 7 x 10

2: Divide 350 by 7 350 ÷ 7 = 50**3,500 ÷ 7 = 50**