Understanding Number Lines and Multiplication

This video tutorial teaches how to multiply by multiples of 10 using number lines. It begins with an introduction to multiples of 10 and explains how open number lines can be used as a visual aid for multiplication. The tutorial includes several examples, such as calculating the total number of jelly beans, multiplying five by thirty, and determining the total pages Lexi read. Each example demonstrates the use of number lines to simplify multiplication. The lesson concludes with a recap of the key concepts covered.

What is a multiple of 10?

• A number that is a product of 5 and another number

• A number that can be divided by 5

• A number that is a product of 10 and another number

• A number that ends with 5

What is an open number line?

• A number line with only even numbers

• A number line with only odd numbers

• A number line with no numbers or tick marks

• A number line with numbers and tick marks

What is the first step in using a number line to multiply?

• Add numbers to the line

• Start with zero

• Start with the largest number

• Add tick marks to the line

If you start with 420 jelly beans and add two bags of 20 jelly beans each, how many do you have?

• 500

• 460

• 440

• 480

How can you use a number line to find the product of five and thirty?

• By adding five thirty times

• By adding thirty five times

• By adding five thirty times

• By adding thirty five times

What is the product of five times fifty using a number line?

• 350

• 300

• 250

• 200

What is the result of adding 30 to 90 on a number line?

• 110

• 120

• 130

• 140

How do you rearrange the problem of fifty tick marks of five?

• Fifty times five

• Five times fifty

• Five plus fifty

• Fifty plus five

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

• 200

• 220

• 260

• 240

What is the final step in solving a multiplication problem using a number line?

• Multiply the numbers

• Add the numbers

• Subtract the numbers

• Count the tick marks