Multiplying by Multiples of 10 Using Number Lines

This lesson teaches how to multiply by multiples of 10 using a number line. It explains the concept of multiples of 10 and demonstrates how to use open number lines for multiplication through various examples, such as calculating jellybeans, multiplying numbers like 5 and 30, and determining the total pages read by Lexi. The lesson emphasizes the use of tick marks and intervals on number lines to simplify multiplication and introduces the idea of skip counting.

What is a multiple of 10?

• A number that is subtracted from 10

• A product of a number multiplied by 10

• A number that can be divided by 10

• A number that is added to 10

What is the result of adding 20 to 530 on a number line?

• 540

• 570

• 550

• 560

How many jellybeans do you have after adding two bags of 20 jellybeans each to 420?

• 460

• 450

• 440

• 470

What is the product of 5 and 30 using a number line?

• 130

• 120

• 140

• 150

How can you rearrange the multiplication of 50 and 5 to make it easier on a number line?

• 5 times 50

• 50 times 10

• 25 times 2

• 10 times 5

How many pages did Lexi read if she read six books with 40 pages each?

• 240

• 260

• 200

• 220

What is the result of adding 40 to 200 on a number line?

• 250

• 240

• 230

• 220