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Elementary School: 3rd, 4th & 5th Grade
Math
Addition And Subtraction Facts To 20
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Q.1
Which of the following is true?
0%
12 - 20 = 8
0%
20 - 2 = 18
0%
8 + 20 = 12
0%
18 + 20 = 2
Q.2
Which number is missing: 17 + ? = 20
0%
5
0%
3
0%
7
0%
9
Q.3
Which 'family' of facts is incorrect?
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7 + 13 = 20 13 + 7 = 20 20 - 13 = 7 20 - 7 = 13
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8 + 12 = 20 12 + 8 = 20 20 - 8 = 12 20 - 12 = 8
0%
9 + 11 = 20 11 + 9 = 20 20 - 11 = 9 20 - 9 = 11
0%
4 + 14 = 20 14 + 4 = 20 20 - 4 = 14 20 - 14 = 4
Q.4
Which of the following is true?
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2 + 18 = 20 so 20 + 18 = 2
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2 + 18 = 20 so 18 + 2 = 20
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2 + 18 = 20 so 20 + 2 = 18
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2 + 18 = 20 so 18 + 20 = 2
Q.5
Which number fact is incorrect?
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11 + 9 = 20
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9 + 11 = 20
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20 - 9 = 11
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11 - 20 = 9
Q.6
Which 'family' of facts is incorrect?
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2 + 18 = 20 18 + 2 = 20 20 - 18 = 2 20 - 2 = 18
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16 + 5 = 20 5 + 16 = 20 20 - 16 = 5 20 - 5 = 16
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5 + 15 = 20 15 + 5 = 20 20 - 5 = 15 20 - 15 = 5
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10 + 10 = 20 20 - 10 = 10
Q.7
Which of the following pairs of number do not add up to give 20?
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9 + 11
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2 + 18
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16 + 5
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20 + 0
Q.8
Which three other facts go with 16 + 4 = 20?
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20 + 16 = 4 20 + 4 = 16 16 - 20 = 4
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16 - 20 = 4 4 - 20 = 16 20 + 16 = 4
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4 + 16 = 20 16 - 4 = 20 4 - 16 = 20
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4 + 16 = 20 20 - 16 = 4 20 - 4 = 16
Q.9
Which three pairs of numbers all add up to 20?
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19 + 1 17 + 3 5 + 15
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12 + 9 11 + 7 3 + 16
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7 + 20 6 + 12 7 + 19
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4 + 12 16 + 8 20 + 1
Q.10
If you know that 14 + 6 = 20, what else do you know?
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20 + 14 = 6
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20 - 14 = 6
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14 - 20 = 6
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6 - 14 = 20
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