Divide Unit Fractions by Whole Numbers

Front

What is a unit fraction?

Back

A unit fraction is a fraction where the numerator is 1 and the denominator is a positive integer, such as 1/2, 1/3, or 1/4.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2A

Front

How do you divide a unit fraction by a whole number?

Back

To divide a unit fraction by a whole number, multiply the denominator of the fraction by the whole number. For example, 1/4 ÷ 2 = 1/(4×2) = 1/8.

Tags

CCSS.5.NF.B.7C

CCSS.5.NF.B.7A

Front

What is the result of 1/6 ÷ 3?

Back

1/18

Tags

CCSS.5.NF.B.7C

CCSS.5.NF.B.7A

Front

What is the result of 1/4 ÷ 5?

Back

1/20

Tags

CCSS.5.NF.B.7A

CCSS.5.NF.B.7C

Front

What is the result of 1/2 ÷ 2?

Back

1/4

Tags

CCSS.5.NF.B.7C

CCSS.5.NF.B.7A

Front

What is the result of 1/9 ÷ 3?

Back

1/27

Tags

CCSS.5.NF.B.7C

CCSS.5.NF.B.7A

Front

What does 'dividing by a whole number' mean in terms of fractions?

Back

Dividing by a whole number means finding how many times that whole number fits into the fraction.

Front

If you divide a fraction by a whole number, what happens to the size of the fraction?

Back

The size of the fraction decreases; it becomes smaller.

Tags

CCSS.5.NF.B.7C

CCSS.5.NF.B.7A

Front

What is the general formula for dividing a unit fraction by a whole number n?

Back

The formula is: 1/a ÷ n = 1/(a×n), where a is the denominator of the unit fraction.

Tags

CCSS.5.NF.B.7C

CCSS.5.NF.B.7A

Front

Can you give an example of dividing a unit fraction by a whole number?

Back

Sure! For example, 1/3 ÷ 4 = 1/(3×4) = 1/12.

Tags

CCSS.5.NF.B.7C

CCSS.5.NF.B.7A