Subtract from 20

Subtraction of two numbers with minuend up to 20

16

-

15


12

-

1


14

-

10


15

-

12


15

-

7


2

-

1


7

-

3


12

-

1


19

-

6


17

-

15


19

-

1


15

-

9


13

-

8


11

-

7


15

-

1


4

-

1


7

-

1


11

-

7


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