medium Set 4 Form Exercise
01
3 - 2 = ___
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1

02
5 - 4 = ___
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1

03
17 - 4 = ___
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13

04
2 - 1 = ___
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1

05
18 - 2 = ___
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16

06
9 - 2 = ___
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7

07
3 - 2 = ___
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1

08
14 - 13 = ___
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1

09
2 - 1 = ___
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1

10
8 - 6 = ___
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2

11
19 - 16 = ___
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3

12
2 - 1 = ___
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1

13
8 - 2 = ___
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6

14
8 - 2 = ___
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6

15
17 - 7 = ___
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10

16
13 - 2 = ___
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11

17
7 - 4 = ___
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3

18
18 - 15 = ___
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3

19
3 - 1 = ___
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2

20
8 - 3 = ___
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5