“Αφαι-πρός” (μέσα στην εικοσάδα)
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2 + 9 = 11 |
9 + 2 = 11 |
11 – 2 = 9 |
11 – 9 =2 |
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3 + 8 = 11 |
8 +3 = 11 |
11 – 3 = 8 |
11 - 8 =3 |
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3 + 9 = 12 |
9 + 3 = 12 |
12 – 3 = 9 |
12 – 9 = 3 |
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4 + 7 = 11 |
7 + 4 = 11 |
11 – 4 = 7 |
11 – 7 = 4 |
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4 + 8 = 12 |
8 + 4 = 12 |
12 – 4 = 8 |
12 – 8 = 4 |
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4 + 9 = 13 |
9 + 4 = 13 |
13 – 4 = 9 |
13 – 9 =4 |
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5 + 6 = 11 |
6 + 5 = 11 |
11 – 6 = 5 |
11 – 5 =6 |
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5 + 7 = 12 |
7 + 5 = 12 |
12 – 5 = 7 |
12 – 7 = 5 |
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5 + 8 = 13 |
8 + 5 = 13 |
13 – 5 = 8 |
13 – 8 = 5 |
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5 + 9 = 14 |
9 + 5 = 14 |
14 – 5 = 9 |
14 – 9 =5 |
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6 + 6 = 12 |
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12 – 6 = 6 |
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6 + 7 = 13 |
7 + 6 = 13 |
13 – 6 = 7 |
13 – 7 = 6 |
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6 + 8 = 14 |
8 + 6 = 14 |
14 – 6 = 8 |
14 – 8 = 6 |
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6 + 9 = 15 |
9 + 6 = 15 |
15 – 6 = 9 |
15 – 9 = 6 |
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7 + 7 = 14 |
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14 – 7 = 7 |
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7 + 8 = 15 |
8 + 7 = 15 |
15 – 7 = 8 |
15 – 8 = 7 |
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7 + 9 = 16 |
9 + 7 = 16 |
16 – 7 =9 |
16 – 9 = 7 |
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8 + 8 = 16 |
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16 – 8 = 8 |
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8 + 9 = 17 |
9 + 8 = 17 |
17 – 9 = 8 |
17 – 8 = 9 |
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9 + 9 = 18 |
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18 – 9 = 9 |
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