How to Multiply by 5

Instructor: Christine Quist

Christine has taught 4th-5th grade, has worked as a Paraprofessional for Adult Learners, and has a master's degree in Curriculum and Instruction for Elementary Education.

This lesson will teach you how to multiply by 5. It will give you some helpful tips and show you how a clock can be a handy tool when learning your 5x facts.

Multiplying by 5

Pretend you have just been handed a sack of shiny new nickels, which are each worth 5 cents. To find out how much money you have, we will need to multiply the total number of nickels by 5 cents.

This bag holds 100 nickels. 5 times the 1 in 100 equals 5. Then add the zeros back on the end, and we have 500. 5 x 100 = 500, so we have 500 cents, or $5.00. You just multiplied by 5!

Counting by Fives

Multiplying by fives is the same as counting by fives. Counting by fives is easy because you skip any number that does not end in a zero or a five. So in 5 x 4, we'll count 5, 10, 15, 20 to get to our product.

The product is the answer to a multiplication problem. All the products, or answers, to a 5x problem will either end in a zero or a five, like in 10 and 25. Let's look at another handy tool to help you practice.

On the Clock

Did you ever notice that each number on the clock adds five more minutes? The 1 means it's been five minutes, the 2 means ten minutes, and if you go up to the 12, it means 60 minutes, or one whole hour, has gone by! This makes the clock a good tool when memorizing your 5x facts.

Clock of Fives

If the long hand is on the four, we know that we have to add 5 four times. 5 + 5 + 5 + 5. To do this, you will count 1, 2, 3, 4 and add five each time: 5, 10, 15, 20. 5 x 4 = 20.

For 5 x 8, you will count around to the 8 by 5s. We found out in the last problem that 5 x 4 = 20, so we can start at the 4 knowing that it stands for 20. Point to the 4 on the clock in the picture and continue counting by 5s to the 8: 20, 25, 30, 35, 40. 5 x 8 = 40. Use your clock to practice your 5x facts!

Multiplying Larger Numbers by 5

When you multiply 5 by a larger number like 78, you will still use your 5x facts!

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