0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Скільки
4. 5 + 2 = 7
5 + 3 = 8 3 – 1 = 2
3 – 2 = 1 10 – 7 = 3 10 – 8 = 2 7 + 0 = 7
7 – 0 = 7
4 + 2 = 6
4 – 2 = 2
1 + 1 = 2
2 + 1 = 3 3 + 1 = 4 4 + 1 = 5 10 – 1 = 9 9 – 1 = 8 8 – 1 = 7
7 – 1 = 6
6 – 1 = 5
5 – 1 = 4
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