4-9 Partial Products Math

4-9 Partial Products Math

Partitioning Rectangles Review

Draw a rectangle to show amount.

Decompose or break apart the numbers.

Multiply the two aligning numbers.

Add up the products to find the final sum.

Partial Products for Multiplication

• Decompose the numbers.

• Make 4 total factor pairs. Why is it 4?

• Solve and line up your products.

• Add up to find the total sum.

Fill in the Blanks

Solve.

46 x 38 = ?

Decompose 46 into 40 & _.

Fill in the Blanks

Solve.

46 x 38 = ?

Decompose 38 into

& 8.

Fill in the Blanks

Solve.

46 x 38 = ?

Now we that have made 40 + 6 and 30 + 8.

Step 1. Solve 40 x 30 =

Fill in the Blanks

Solve.

46 x 38 = ?

40 x 30 = 1,200

40 x 8 =

Fill in the Blanks

Solve.

46 x 38 = ?

40 x 30 = 1,200

40 x 8 = 320

30 x 6 =

Fill in the Blanks

Solve.

46 x 38 = ?

40 x 30 = 1,200

40 x 8 = 320

30 x 6 = 180

6 x 8 =

Fill in the Blanks

Solve.

46 x 38 = ?

6 x 8 = 48

40 x 8 = 320

30 x 6 = 180

40 x 30 = 1,200

Fill in the Blanks

Solve all the way to your final answer using the partial products strategy.

34 x 58 =

Fill in the Blanks

Solve all the way to your final answer.

65 x 32 =