medium Set 4 Form Exercise
01
7 - 6 = ___
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1

02
6 - 1 = ___
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5

03
13 - 1 = ___
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12

04
2 - 1 = ___
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1

05
3 - 1 = ___
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2

06
3 - 2 = ___
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1

07
5 - 1 = ___
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4

08
2 - 1 = ___
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1

09
8 - 1 = ___
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7

10
7 - 3 = ___
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4

11
2 - 1 = ___
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1

12
12 - 1 = ___
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11

13
3 - 1 = ___
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2

14
19 - 14 = ___
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5

15
9 - 4 = ___
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5

16
18 - 10 = ___
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8

17
18 - 6 = ___
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12

18
6 - 5 = ___
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1

19
9 - 5 = ___
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4

20
15 - 12 = ___
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3