Multiplying Two-Digit Numbers by Multiples of 10

The video tutorial demonstrates how to multiply two-digit numbers by multiples of 10 using models. It explains the concept of partial products and provides three examples: 43 times 20, 87 times 40, and 52 times 20. Each example involves breaking down the numbers into tens and ones, using a model to find partial products, and then adding them to get the final result.

What is a multiple of 10?

• A number that is odd

• A number that ends in 0

• A number that ends in 5

• A number that is prime

In the example 43 times 20, what is the value of the digit in the tens place of 43?

• 30

• 40

• 4

• 3

What is the result of multiplying 20 by 40 in the first example?

• 1200

• 1000

• 800

• 600

In the second example, what is the value of the digit in the tens place of 87?

• 7

• 70

• 80

• 8

What is the result of multiplying 40 by 80 in the second example?

• 3600

• 2800

• 4000

• 3200

In the third example, what is the value of the digit in the ones place of 52?

• 5

• 50

• 20

• 2

What is the result of multiplying 50 by 20 in the third example?

• 1200

• 1040

• 1000

• 1100

What is the final result of 52 times 20 in the third example?

• 1000

• 1040

• 1080

• 1120

What is the purpose of using models in multiplication?

• To make the numbers smaller

• To find partial products

• To avoid using zero

• To make the process faster

What is the final step after finding partial products in these examples?

• Divide them

• Add them up

• Multiply them again

• Subtract them