# Subtruction in 10-20 range

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Questions — 55
11 - 1 = 10
12 - 1 = 11
12 - 2 = 10
13 - 1 = 12
13 - 2 = 11
13 - 3 = 10
14 - 1 = 13
14 - 2 = 12
14 - 3 = 11
14 - 4 = 10
15 - 1 = 14
15 - 2 = 13
15 - 3 = 12
15 - 4 = 11
15 - 5 = 10
16 - 1 = 15
16 - 2 = 14
16 - 3 = 13
16 - 4 = 12
16 - 5 = 11
16 - 6 = 10
17 - 1 = 16
17 - 2 = 15
17 - 3 = 14
17 - 4 = 13
17 - 5 = 12
17 - 6 = 11
17 - 7 = 10
18 - 1 = 17
18 - 2 = 16
18 - 3 = 15
18 - 4 = 14
18 - 5 = 13
18 - 6 = 12
18 - 7 = 11
18 - 8 = 10
19 - 1 = 18
19 - 2 = 17
19 - 3 = 16
19 - 4 = 15
19 - 5 = 14
19 - 6 = 13
19 - 7 = 12
19 - 8 = 11
19 - 9 = 10
20 - 1 = 19
20 - 2 = 18
20 - 3 = 17
20 - 4 = 16
20 - 5 = 15
20 - 6 = 14
20 - 7 = 13
20 - 8 = 12
20 - 9 = 11
20 - 10 = 10

Learn the “Subtruction in 10-20 range” goal with the Leitner system. Move all of the goal questions from the first repetition basket to the last, and you will remember the cards seriously and for a long time. The current distribution of the cards in the baskets is as follows:

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55
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3
4
5