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How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

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231 Cards in this Set

  • Front
  • Back
20 - 0 =
20
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
20 - 11 =
9
20 - 12 =
8
20 - 13 =
7
20 - 14 =
6
20 - 15 =
5
20 - 16 =
4
20 - 17 =
3
20 - 18 =
2
20 - 19 =
1
20 - 20 =
0
19 - 0 =
19
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
19 - 10 =
9
19 - 11 =
8
19 - 12 =
7
19 - 13 =
6
19 - 14 =
5
19 - 15 =
4
19 - 16 =
3
19 - 17 =
2
19 - 18 =
1
19 - 19 =
0
18 - 0 =
18
18 - 1 =
17
18 - 2 =
16
18 - 3 =
15
18 - 4 =
14
18 - 5 =
13
18 - 6 =
12
18 - 7 =
11
18 - 8 =
10
18 - 9 =
9
18 - 10 =
8
18 - 11 =
7
18 - 12 =
6
18 - 13 =
5
18 - 14 =
4
18 - 15 =
3
18 - 16 =
2
18 - 17 =
1
18 - 18 =
0
17 - 0 =
17
17 - 1 =
16
17 - 2 =
15
17 - 3 =
14
17 - 4 =
13
17 - 5 =
12
17 - 6 =
11
17 - 7 =
10
17 - 8 =
9
17 - 9 =
8
17 - 10 =
7
17 - 11 =
6
17 - 12 =
5
17 - 13 =
4
17 - 14 =
3
17 - 15 =
2
17 - 16 =
1
17 - 17 =
0
16 - 0 =
16
16 - 1 =
15
16 - 2 =
14
16 - 3 =
13
16 - 4 =
12
16 - 5 =
11
16 - 6 =
10
16 - 7 =
9
16 - 8 =
8
16 - 9 =
7
16 - 10 =
6
16 - 11 =
5
16 - 12 =
4
16 - 13 =
3
16 - 14 =
2
16 - 15 =
1
16 - 16 =
0
15 - 0 =
15
15 - 1 =
14
15 - 2 =
13
15 - 3 =
12
15 - 4 =
11
15 - 5 =
10
15 - 6 =
9
15 - 7 =
8
15 - 8 =
7
15 - 9 =
6
15 - 10 =
5
15 - 11 =
4
15 - 12 =
3
15 - 13 =
2
15 - 14 =
1
15 - 15 =
0
14 - 0 =
14
14 - 1 =
13
14 - 2 =
12
14 - 3 =
11
14 - 4 =
10
14 - 5 =
9
14 - 6 =
8
14 - 7 =
7
14 - 8 =
6
14 - 9 =
5
14 - 10 =
4
14 - 11 =
3
14 - 12 =
2
14 - 13 =
1
14 - 14 =
0
13 - 0 =
13
13 - 1 =
12
13 - 2 =
11
13 - 3 =
10
13 - 4 =
9
13 - 5 =
8
13 - 6 =
7
13 - 7 =
6
13 - 8 =
5
13 - 9 =
4
13 - 10 =
3
13 - 11 =
2
13 - 12 =
1
13 - 13 =
0
12 - 0 =
12
12 - 1 =
11
12 - 2 =
10
12 - 3 =
9
12 - 4 =
8
12 - 5 =
7
12 - 6 =
6
12 - 7 =
5
12 - 8 =
4
12 - 9 =
3
12 - 10 =
2
12 - 11 =
1
12 - 12 =
0
11 - 0 =
11
11 - 1 =
10
11 - 2 =
9
11 - 3 =
8
11 - 4 =
7
11 - 5 =
6
11 - 6 =
5
11 - 7 =
4
11 - 8 =
3
11 - 9 =
2
11 - 10 =
1
11 - 11 =
0
10 - 0 =
10
10 - 1 =
9
10 - 2 =
8
10 - 3 =
7
10 - 4 =
6
10 - 5 =
5
10 - 6 =
4
10 - 7 =
3
10 - 8 =
2
10 - 9 =
1
10 - 10 =
0
9 - 0 =
9
9 - 1 =
8
9 - 2 =
7
9 - 3 =
6
9 - 4 =
5
9 - 5 =
4
9 - 6 =
3
9 - 7 =
2
9 - 8 =
1
9 - 9 =
0
8 - 0 =
8
8 - 1 =
7
8 - 2 =
6
8 - 3 =
5
8 - 4 =
4
8 - 5 =
3
8 - 6 =
2
8 - 7 =
1
8 - 8 =
0
7 - 0 =
7
7 - 1 =
6
7 - 2 =
5
7 - 3 =
4
7 - 4 =
3
7 - 5 =
2
7 - 6 =
1
7 - 7 =
0
6 - 0 =
6
6 - 1 =
5
6 - 2 =
4
6 - 3 =
3
6 - 4 =
2
6 - 5 =
1
6 - 6 =
0
5 - 0 =
5
5 - 1 =
4
5 - 2 =
3
5 - 3 =
2
5 - 4 =
1
5 - 5 =
0
4 - 0 =
4
4 - 1 =
3
4 - 2 =
2
4 - 3 =
1
4 - 4 =
0
3 - 0 =
3
3 - 1 =
2
3 - 2 =
1
3 - 3 =
0
2 - 0 =
2
2 - 1 =
1
2 - 2 =
0
1 - 0 =
1
1 - 1 =
0
0 - 0 =
0