Divisibility rules

Front

What is a divisibility rule?

Back

A divisibility rule is a shortcut that helps determine if one number can be divided by another without performing the actual division.

Tags

CCSS.3.OA.D.9

Front

What is the divisibility rule for 2?

Back

A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8).

Tags

CCSS.3.OA.D.9

Front

What is the divisibility rule for 3?

Back

A number is divisible by 3 if the sum of its digits is divisible by 3.

Tags

CCSS.4.OA.B.4

Front

What is the divisibility rule for 5?

Back

A number is divisible by 5 if its last digit is 0 or 5.

Tags

CCSS.2.OA.C.3

Front

What is the divisibility rule for 10?

Back

A number is divisible by 10 if its last digit is 0.

Tags

CCSS.3.OA.D.9

Front

What is the divisibility rule for 4?

Back

A number is divisible by 4 if the last two digits form a number that is divisible by 4.

Tags

CCSS.3.OA.D.9

Front

What is the divisibility rule for 6?

Back

A number is divisible by 6 if it is divisible by both 2 and 3.

Tags

CCSS.3.OA.D.9

Front

What is the divisibility rule for 9?

Back

A number is divisible by 9 if the sum of its digits is divisible by 9.

Tags

CCSS.3.OA.D.9

Front

Is 70,110 divisible by 2?

Back

Yes, because its last digit is 0.

Front

Is 70,110 divisible by 3?

Back

Yes, because the sum of its digits (7+0+1+1+0=9) is divisible by 3.

Tags

CCSS.4.OA.B.4