Adding fractions with unlike denominators quiz

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30
• 11
• 6
• 5

Is this a correct answer?

• Yes, the student correctly added.
• No, you cannot add unlike denominators
• No, 5 + 7 is not 12
• No, 2 + 3 is not 5

1/3 + 4/9 =

• 7/9
• 5/9
• 6/9
• 5/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

1/9 + 2/27

• 3/27
• 5/27
• 3/27
• 3/36

1/4 + 3/8 =

• 5/8
• 3/8
• 4/12
• 4/8

What number could be a common denominator for these two fractions?
3/10   and   1/5

• 5
• 10
• 15
• These numbers do not have a common denominator

4/8 + 1/3 =

• 5/11
• 4/8
• 13/24
• 4/11

• 4/9
• 1/4
• 3/12
• 5/9

2 1/4 + 3 2/12

• 5 3/4
• 5 5/12
• 5 3/12
• 5 2/4

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

2/5 + 3/10

• 7/10
• 5/10
• 1/2
• 5/15

Tags

CCSS.4.NF.C.5