Subtract from 20

Subtraction of two numbers with minuend up to 20

14

-

5


7

-

4


2

-

1


16

-

6


4

-

1


15

-

1


18

-

17


6

-

3


4

-

1


12

-

4


8

-

1


15

-

14


6

-

2


2

-

1


19

-

9


11

-

9


14

-

10


5

-

4


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