easy Set 1 Form Exercise
01
13 - 7 = ___
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6

02
20 - 17 = ___
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3

03
10 - 8 = ___
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2

04
20 - 18 = ___
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2

05
10 - 9 = ___
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1

06
10 - 5 = ___
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5

07
13 - 5 = ___
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8

08
11 - 9 = ___
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2

09
14 - 7 = ___
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7

10
10 - 7 = ___
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3

11
13 - 6 = ___
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7

12
20 - 18 = ___
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2

13
10 - 9 = ___
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1

14
12 - 8 = ___
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4

15
10 - 8 = ___
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2

16
13 - 4 = ___
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9

17
14 - 6 = ___
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8

18
10 - 9 = ___
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1

19
10 - 9 = ___
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1

20
10 - 4 = ___
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6