Effective Strategies for 2-Digit by 1-Digit Multiplication

What is the first step in the standard algorithm for multiplying 32 by 8?

• Multiply 8 by 2

• Subtract 2 from 8

• Multiply 8 by 3

• Add 8 and 2

When using the standard algorithm, what do you do after multiplying 8 by 2?

• Add 8 and 2

• Multiply 8 by 3

• Carry the 1 and write down the 6

• Write down the 16

How do you break down 32 when using the tens and ones strategy?

• 32 and 0

• 20 and 12

• 30 and 3

• 30 and 2

What is the result of 30 times 8 in the tens and ones strategy?

• 24

• 300

• 32

• 240

In the area model, what do you multiply 8 by first?

• 8

• 2

• 30

• 32

What is the sum of 240 and 16 in the area model?

• 250

• 256

• 240

• 260

How many times do you add 32 in the repeated addition method?

• 4

• 8

• 6

• 2

What is the sum of 64 plus 64?

• 128

• 64

• 256

• 32

What is the final sum when you add 128 plus 128 in the repeated addition method?

• 32

• 128

• 256

• 64

Which of the following is NOT a strategy mentioned for multiplying 54 by 3?

• Division

• Standard Algorithm

• Tens and Ones

• Area Model