Adding fractions

What is the first step in adding fractions with different denominators?

• Find the least common multiple (LCM) of the denominators

• Add the numerators together directly

• Multiply the denominators together

• Find the greatest common divisor (GCD) of the denominators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common multiple (LCM) of 4 and 6?

• 10

• 8

• 24

• 12

Which of the following fractions cannot be added directly without finding a common denominator?

• 1/3 and 1/4

• 2/5 and 1/7

• 4/9 and 3/10

• 3/8 and 2/6

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is 2/3 + 3/4 when expressed with a common denominator?

• 5/7

• 7/12

• 6/7

• 1/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

If you add 1/3 and 1/6, what is the resulting fraction in its simplest form?

• 2/9

• 3/9

• 1/2

• 2/6

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the sum of 1/2 and 2/5 when expressed with a common denominator?

• 9/10

• 4/10

• 7/10

• 1/10

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Which of the following pairs of fractions can be added directly without finding a common denominator?

• 3/7 and 2/14

• 5/8 and 3/4

• 1/2 and 3/6

• 7/10 and 2/5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common multiple (LCM) of 9 and 12?

• 36

• 108

• 72

• 24

What is the sum of 3/8 and 1/4 when expressed with a common denominator?

• 5/8

• 1/2

• 2/3

• 3/4

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common multiple (LCM) of 5 and 10?

• 5

• 10

• 15

• 20