Rewrite a sum by taking out the GCF

Question 1

21 + 9 = □ × (7 + 3). What number goes in the box?

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Question 2

Complete using the GCF: 65 + 78 = 13(5 + □)

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Question 3

Write 21 + 9 as the GCF times a sum of two whole numbers with no common factor, like 4(2 + 3).

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Question 4

36 + 27 = □ × (4 + 3). What number goes in the box?

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Question 5

Complete using the GCF: 105 + 60 = 15(7 + □)

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Question 6

Write 22 + 99 as the GCF times a sum of two whole numbers with no common factor, like 4(2 + 3).

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Question 7

36 + 16 = □ × (9 + 4). What number goes in the box?

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Question 8

Complete using the GCF: 30 + 25 = 5(6 + □)

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Question 9

Write 9 + 36 as the GCF times a sum of two whole numbers with no common factor, like 4(2 + 3).

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Question 10

30 + 25 = □ × (6 + 5). What number goes in the box?

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Question 11

Complete using the GCF: 24 + 32 = 8(3 + □)

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Question 12

Write 35 + 25 as the GCF times a sum of two whole numbers with no common factor, like 4(2 + 3).

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Question 13

15 + 12 = □ × (5 + 4). What number goes in the box?

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Question 14

Complete using the GCF: 63 + 27 = 9(7 + □)

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Question 15

Write 20 + 12 as the GCF times a sum of two whole numbers with no common factor, like 4(2 + 3).

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Question 16

30 + 20 = □ × (3 + 2). What number goes in the box?

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