Subtract from 20

Subtraction of two numbers with minuend up to 20

4

-

1


19

-

15


4

-

2


4

-

3


15

-

5


12

-

6


14

-

11


14

-

7


5

-

2


20

-

11


2

-

1


12

-

3


16

-

10


5

-

4


7

-

2


17

-

1


16

-

13


6

-

5


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