6.1 Arrays and Using an Expanded Algorithm

Use the array to find the partial products. Add the partial products to find the product.

42x8

Use the array to find the partial products. Add the partial products to find the product.

39x7

Use the array to find the partial products. Add the partial products to find the product.

27x6

Use the array to find the partial products. Add the partial products to find the product.

7x14

Use the array to find the partial products. Add the partial products to find the product.

52x3

Use the array to find the partial products. Add the partial products to find the product.

4x42

Use the array to find the partial products. Add the partial products to find the product.

5x26

Alex can type 72 words per minute. How many

words can Alex type in 5 minutes?

Alex can type 44 words per minute. How many

words can Alex type in 8 minutes?

Explain how you can use an array to find partial products for 4 × 36.

• Show 4 rows of 3 columns of tens blocks. Then show 4 rows of 6 ones blocks. Add the totals of the tens and ones blocks together

• Show 3 rows of 3 columns of tens blocks. Then show 4 rows of 6 ones blocks. Add the totals of the tens and ones blocks together

• Show 4 rows of 4 columns of tens blocks. Then show 4 rows of 6 ones blocks. Add the totals of the tens and ones blocks together

• Show 3 rows of 4 columns of tens blocks. Then show 6 rows of 4ones blocks. Add the totals of the tens and ones blocks together