Add, Subtract, Multiply Fractions

What must you have to add and subtract fractions?

• Common numerators
• Different numerators
• Different denominators
• Common denominators

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

^{To add or subtract two fractions with like denominators...}

• write the sum or difference of the numerators over the denominator.
• first write equivalent fractions with a common denominator.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

^{To add or subtract two fractions with unlike denominators...}

• write the sum or difference of the numerators over the denominator.
• first write equivalent fractions with a common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

One method you can use to write equivalent fractions with a common denominator:

• Use the greatest common factor (GCF).
• Use the least common denominator (LCD).

The LCD of two or more fractions is the least common multiple (LCM) of the denominators.

• True
• False
• I don't know
• I don't care

Which fraction is equivalent to 1/2?

• 10/19
• 10/17
• 10/11
• 10/20

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

2/5 + 1/5

• 1/5
• 2/5
• 3/5
• 4/5

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Solve: ³/₁₂ + ⁵/₁₂

• ⅓

• 1¼

• 8/12

• ⅙

1/14 + 5/14

• 5/14

• 7/3

• 6/14

• 14/5

1/6 + 1/6

• 2/6

• 2/3

• 5/6

• 1/12