Math Fractions with Common Denominators

For two or more fractions, a common multiple of the denominators.

• common denominators

• common numerators

• equivalent fractions

The bottom number in a fraction, which shows how many equal parts the whole is divided into; also called the divisor.

• denominator

• numerator

• unit fraction

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

What is ¹/₈ + ⁵/₈?

• 1
• ⁶/₁₆ or ³/₈
• ⁶/₈ or ³/₄
• ²/₄ or ¹/₂

What is ³/₄ + ¹/₄?

• or ⁴/₄

• ³/₄ 

• ¹⁰/₁₆ or ⁵/₈ 

• ¹/₄

What is the Least Common Denominator of 1/5 + 2/10

• 5

• 10

• 50

• 15

4/6 + 2/3

• 8/18

• 4/9

• 6/9

• 8/9

Daniel watched a beetle and a spider on the sidewalk. The beetle crawled 1/2 of a yard and the spider crawled 1/6 of a yard. How much farther did the beetle crawl than the spider?

• 1/4

• 1/3

• 1/2

• 2/3

13/15 - 3/4

• 10/9

• 39/60

• 7/60

• 97/60