medium Set 3 Form Exercise
01
14 - 13 = ___
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1

02
5 - 1 = ___
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4

03
17 - 6 = ___
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11

04
2 - 1 = ___
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1

05
17 - 16 = ___
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1

06
2 - 1 = ___
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1

07
3 - 2 = ___
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1

08
5 - 1 = ___
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4

09
9 - 6 = ___
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3

10
2 - 1 = ___
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1

11
7 - 5 = ___
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2

12
8 - 5 = ___
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3

13
20 - 10 = ___
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10

14
7 - 2 = ___
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5

15
4 - 3 = ___
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1

16
6 - 3 = ___
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3

17
19 - 12 = ___
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7

18
9 - 3 = ___
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6

19
2 - 1 = ___
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1

20
17 - 13 = ___
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4