How Do You Teach Elementary Divisibility Rules In Math?
As students are learning about division, they learn that some numbers are divisible by other numbers, while others have a remainder. There are divisibility rules that can help students figure out whether a number is divisible by another number easily, without going through all of the steps of long division. Explain to students that a number is only divisible by 10 if it ends in a “0.” Explain that a number is only divisible by 5 if it ends in a “5” or a “0.” Write a list of numbers on the board–some ending in 5, some ending in 0, and some ending in a different number. Challenge students to come to the board and circle the numbers divisible by 10. Then have them put a check next to the numbers divisible by 5. Explain to students that a number is only divisible by 2 if it ends in an even number: 2, 4, 6, 8 or 0. Then challenge students to come up with a number that is divisible by 5, 10 and 2. Tell a child that you can tell if a number is divisible by 3 by adding up the digits and seein
