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Elementary School: 3rd, 4th & 5th Grade
Math
Addition And Subtraction Facts To 100
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Q.1
Which one of the following number pairs do not add up to give 100?
0%
100 + 0
0%
90 + 10
0%
60 + 40
0%
20 + 18
Q.2
Which number fact is incorrect?
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6 + 40 = 100
0%
60 + 40 = 100
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40 + 60 = 100
0%
100 - 60 = 40
Q.3
Which number is missing: 10 + ? = 100
0%
100
0%
9
0%
90
0%
10
Q.4
Which three pairs of numbers all add up to 100?
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20 + 80 10 + 90 50 + 50
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10 + 80 20 + 18 60 + 4
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12 + 18 20 + 8 100 + 10
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40 + 6 50 + 5 10 + 9
Q.5
Which of these three other facts go with 30 + 70 = 100?
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100 + 30 = 70 70 - 30 = 100 30 - 70 = 100
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30 + 30 = 70 70 - 30 = 100 30 - 100 = 70
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70 + 70 = 100 30 +30 = 100 100 - 100 = 30
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70 + 30 = 100 100 - 30 = 70 100 - 70 = 30
Q.6
Which of the following is true?
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6 + 4 = 10, so 60 + 4 = 100
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6 + 4 = 10, so 60 + 40 = 100
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6 + 4 = 10, so 16 + 14 = 100
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6 + 4 = 10, so 6 + 40 = 100
Q.7
Which 'family' of facts is incorrect?
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10 + 90 = 100 90 + 10 = 100 100 - 90 = 10 100 - 10 = 90
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20 + 80 = 100 80 + 20 = 100 100 - 20 = 80 100 - 80 = 20
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60 + 50 = 100 50 + 60 = 100 100 - 60 = 50 100 - 50 = 60
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30 + 70 = 100 70 + 30 = 100 100 - 30 = 70 100 - 70 = 30
Q.8
Which of the following is true?
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10 - 80 = 20
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100 - 20 = 80
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80 - 20 = 100
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20 - 80 = 100
Q.9
If you know that 2 + 8 = 10, what else do you know?
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20 + 80 = 100
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12 + 18 = 20
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2 + 80 = 100
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8 + 20 = 100
Q.10
Which 'family' of facts is incorrect?
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35 + 65 = 100 65 + 35 = 100 100 - 35 = 65 100 - 65 = 35
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25 + 75 = 100 75 + 25 = 100 100 - 25 = 75 100 - 75 = 25
0%
15 + 85 = 100 85 + 15 = 100 100 - 85 = 15 100 - 15 = 85
0%
65 + 45 = 100 45 + 65 = 100 100 - 65 = 45 100 - 45 = 65
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