Multiplication

Multiplication

When multiplying numbers it is imperative to estimate to check for reasonableness.  

Multiple Choice

The closest estimate for 18 x 26 Is:

• 400

• 600

• 1,000

How did you know how to estimate for reasonableness?

• Rounded to nearest whole number

• Used the information I knew from prior learning (i.e. 10 x 10 =100).

• Multiplied 20 x 30

Multiple Choice

What is the closest estimate to 32 x 54?

• 500

• 1,000

• 1,500

There are several multiplication Strategies

• Partial Products

• Area Model

• Box and Cluster

• Standard Algorithm

• Strip Diagram

Mrs. Mess will go over each strategy with you, and post those visuals in assignment.

Multiple Choice

Find the product of 53 X 24

• 1227

• 1,000

• 1,512

• 1,272

Multiple Choice

Find the product of 46 x 27

• 1442

• 1,242

• 2,800

• 842

Multiple Choice

What is the closest estimate to 39 x 22?

• 400

• 600

• 800

• 1,200

Open Ended

 $31\ x\ 27$  Solve using two of the strategies you were taught today. 

Poll

What's your Multiplication favorite Strategy?

• Partial Products

• Area Strategy

• Box and Cluster

• Standard Algorithm