Workbook Detail
Grade 1 Addition Within 20 — Set 1
01
1 + 3 = ___
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4
02
1 + 1 = ___
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2
03
10 + 5 = ___
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15
04
1 + 15 = ___
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16
05
1 + 17 = ___
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18
06
6 + 11 = ___
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17
07
10 + 10 = ___
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20
08
2 + 15 = ___
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17
09
2 + 10 = ___
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12
10
1 + 5 = ___
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6
11
10 + 1 = ___
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11
12
3 + 16 = ___
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19
13
8 + 10 = ___
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18
14
2 + 3 = ___
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5
15
1 + 2 = ___
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3
16
1 + 7 = ___
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8
17
10 + 8 = ___
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18
18
5 + 1 = ___
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6
19
4 + 1 = ___
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5
20
8 + 11 = ___
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19