Multiplication Strategies

I can find that product!

​Finding products using the area model and partial product strategies.

Multiplying 1 and 2-digit numbers

• Box method

• Partial products (break it up)

• Regrouping (old school)

Box Method

• Draw your box/boxes (have enough boxes for the number of factors you will have)

• Put the factors on either side

• Write 5x642 as 5 on one side(vertical side) and 600 40 2 on the horizontal side.

• Multiply the number on the vertical side by each number on the horizontal side

• Add the boxes together to get your final answer

• Write 64 x 22 as 60 4 and 20 2 on each side

• Multiply each box

• Add the top boxes

• Add the bottom boxes

• Add the final two numbers to get the final product

Multiple Choice

Finish the problem in the picture.

• 1016
• 916
• 786
• 816

Multiple Choice

What goes in the yellow box?

• 60

• 160

• 1600

• 1200

Partial Products

REMEMBER you can only break up one of the two factors when you multiply with partial products.

24x12 I can break up one one of the two factors. I choose 12.

24x10 =240 (it is 24x10 because the 1 is in the tens place)

24x2=48 (it is 24x2 because the 2 is in the ones place)

Then, I add up both products.

240+48= 288

Multiple Choice

Find the answer to 243x9 using partial products

• 2128

• 2187

• 2817

Multiple Choice

Which of these multiplication problems is a part of 5,812 x 7?

• 7 x 100

• 7 x 5

• 7 x 800

• 70 x 2

Regrouping (old school)

• multiply both top digits by the ones digit on the bottom

• carry if you have to

• put a zero in the ones place on the second row

• multiply both top digits by the tens digit on the bottom

• add up both of the product rows to get your final product

Multiple Choice

54 x 52

• 2808

• 2788

• 2800

• 2728

Fill in the Blanks

Use regrouping to solve 73 x 39.

Great work!