Here are the solutions for the math problems on the worksheets. I have solved them using the "doubles" and "near doubles" strategy, which means looking at a number plus itself (like 4 + 4) to help solve a problem like 4 + 5.
Worksheet 1 (Left Page)
Left Column:
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2 + 2 = 4
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9 + 9 = 18
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4 + 4 = 8
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7 + 7 = 14
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6 + 6 = 12
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5 + 5 = 10
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8 + 8 = 16
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3 + 3 = 6
Right Column:
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2 + 3 = 5 (Think: 2 + 2 is 4, add 1 more)
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9 + 10 = 19 (Think: 9 + 9 is 18, add 1 more)
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4 + 5 = 9 (Think: 4 + 4 is 8, add 1 more)
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7 + 8 = 15 (Think: 7 + 7 is 14, add 1 more)
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6 + 7 = 13 (Think: 6 + 6 is 12, add 1 more)
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5 + 6 = 11 (Think: 5 + 5 is 10, add 1 more)
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8 + 9 = 17 (Think: 8 + 8 is 16, add 1 more)
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3 + 4 = 7 (Think: 3 + 3 is 6, add 1 more)
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Worksheet 2 (Middle Page)
Left Column:
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4 + 4 = 8
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6 + 6 = 12
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2 + 2 = 4
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9 + 9 = 18
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8 + 8 = 16
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3 + 3 = 6
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7 + 7 = 14
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10 + 10 = 20
Right Column:
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4 + 5 = 9 (Think: 4 + 4 is 8, add 1 more)
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6 + 7 = 13 (Think: 6 + 6 is 12, add 1 more)
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2 + 3 = 5 (Think: 2 + 2 is 4, add 1 more)
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9 + 8 = 17 (Think: 8 + 8 is 16, add 1 more... or 9+9 is 18, take 1 away)
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8 + 7 = 15 (Think: 7 + 7 is 14, add 1 more)
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3 + 4 = 7 (Think: 3 + 3 is 6, add 1 more)
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7 + 8 = 15 (Think: 7 + 7 is 14, add 1 more)
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10 + 11 = 21 (Think: 10 + 10 is 20, add 1 more)
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Worksheet 3 (Right Page)
Left Column:
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7 + 7 = 14
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8 + 8 = 16
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6 + 6 = 12
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10 + 10 = 20
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15 + 15 = 30
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12 + 12 = 24
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30 + 30 = 60
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50 + 50 = 100
Right Column:
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7 + 8 = 15 (Think: 7 + 7 is 14, add 1 more)
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8 + 9 = 17 (Think: 8 + 8 is 16, add 1 more)
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6 + 5 = 11 (Think: 5 + 5 is 10, add 1 more)
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10 + 11 = 21 (Think: 10 + 10 is 20, add 1 more)
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15 + 16 = 31 (Think: 15 + 15 is 30, add 1 more)
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13 + 12 = 25 (Think: 12 + 12 is 24, add 1 more)
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30 + 32 = 62 (Think: 30 + 30 is 60, add 2 more)
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52 + 51 = 103 (Think: 51 + 51 is 102, add 1 more... or 50+50=100, 2+1=3, total 103)
Final Answer:
See the calculated lists above for every problem on the three pages.
Parent Tip: Review the logic above to help your child master the concept of doubles math facts worksheet.
