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Minus 9

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12 − 3 = ?

Minus 9 — minus 10, plus 1:

13 − 3 = 10
10 − 1 = 9
12 − 3 = 9

14 − 9 = ?

Minus 9 — minus 10, plus 1:

14 − 10 = 4
4 + 1 = 5
14 − 9 = 5

12 − 9 = ?

Minus 9 — minus 10, plus 1:

12 − 10 = 2
2 + 1 = 3
12 − 9 = 3

15 − 9 = ?

Minus 9 — minus 10, plus 1:

15 − 10 = 5
5 + 1 = 6
15 − 9 = 6

16 − 9 = ?

Minus 9 — minus 10, plus 1:

16 − 10 = 6
6 + 1 = 7
16 − 9 = 7

16 − 7 = ?

Minus 9 — minus 10, plus 1:

17 − 7 = 10
10 − 1 = 9
16 − 7 = 9

13 − 4 = ?

Minus 9 — minus 10, plus 1:

14 − 4 = 10
10 − 1 = 9
13 − 4 = 9

14 − 5 = ?

Minus 9 — minus 10, plus 1:

15 − 5 = 10
10 − 1 = 9
14 − 5 = 9

15 − 6 = ?

Minus 9 — minus 10, plus 1:

16 − 6 = 10
10 − 1 = 9
15 − 6 = 9

13 − 9 = ?

Minus 9 — minus 10, plus 1:

13 − 10 = 3
3 + 1 = 4
13 − 9 = 4

14 − 5 = ?

14 − 5 = 9

Minus 9 — minus 10, plus 1:

15 − 5 = 10
10 − 1 = 9
14 − 5 = 9

16 − 7 = ?

16 − 7 = 9

Minus 9 — minus 10, plus 1:

17 − 7 = 10
10 − 1 = 9
16 − 7 = 9

16 − 9 = ?

16 − 9 = 7

Minus 9 — minus 10, plus 1:

16 − 10 = 6
6 + 1 = 7
16 − 9 = 7

14 − 9 = ?

14 − 9 = 5

Minus 9 — minus 10, plus 1:

14 − 10 = 4
4 + 1 = 5
14 − 9 = 5

15 − 6 = ?

15 − 6 = 9

Minus 9 — minus 10, plus 1:

16 − 6 = 10
10 − 1 = 9
15 − 6 = 9

12 − 3 = ?

12 − 3 = 9

Minus 9 — minus 10, plus 1:

13 − 3 = 10
10 − 1 = 9
12 − 3 = 9

12 − 9 = ?

12 − 9 = 3

Minus 9 — minus 10, plus 1:

12 − 10 = 2
2 + 1 = 3
12 − 9 = 3

13 − 4 = ?

13 − 4 = 9

Minus 9 — minus 10, plus 1:

14 − 4 = 10
10 − 1 = 9
13 − 4 = 9

13 − 9 = ?

13 − 9 = 4

Minus 9 — minus 10, plus 1:

13 − 10 = 3
3 + 1 = 4
13 − 9 = 4

15 − 9 = ?

15 − 9 = 6

Minus 9 — minus 10, plus 1:

15 − 10 = 5
5 + 1 = 6
15 − 9 = 6

15 − ? = 6

15 − 9 = 6

Minus 9 — minus 10, plus 1:

15 − 10 = 5
5 + 1 = 6
15 − 9 = 6

15 − ? = 9

15 − 6 = 9

Minus 9 — minus 10, plus 1:

16 − 6 = 10
10 − 1 = 9
15 − 6 = 9

12 − ? = 3

12 − 9 = 3

Minus 9 — minus 10, plus 1:

12 − 10 = 2
2 + 1 = 3
12 − 9 = 3

13 − ? = 4

13 − 9 = 4

Minus 9 — minus 10, plus 1:

13 − 10 = 3
3 + 1 = 4
13 − 9 = 4

13 − ? = 9

13 − 4 = 9

Minus 9 — minus 10, plus 1:

14 − 4 = 10
10 − 1 = 9
13 − 4 = 9

16 − ? = 7

16 − 9 = 7

Minus 9 — minus 10, plus 1:

16 − 10 = 6
6 + 1 = 7
16 − 9 = 7

12 − ? = 9

12 − 3 = 9

Minus 9 — minus 10, plus 1:

13 − 3 = 10
10 − 1 = 9
12 − 3 = 9

14 − ? = 5

14 − 9 = 5

Minus 9 — minus 10, plus 1:

14 − 10 = 4
4 + 1 = 5
14 − 9 = 5

14 − ? = 9

14 − 5 = 9

Minus 9 — minus 10, plus 1:

15 − 5 = 10
10 − 1 = 9
14 − 5 = 9

16 − ? = 9

16 − 7 = 9

Minus 9 — minus 10, plus 1:

17 − 7 = 10
10 − 1 = 9
16 − 7 = 9

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