Ответ:
20
Пошаговое объяснение:
1) (1+8) + (3+5) = 9 + 8 = 17
2) (1+5) + (3+3) = 6 + 6 = 12
3) (2+1) + (7+1) = 3 + 8 = 11
4) (4+1) + (7+8) = 5 + 15 = 20
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Ответ:
20
Пошаговое объяснение:
1) (1+8) + (3+5) = 9 + 8 = 17
2) (1+5) + (3+3) = 6 + 6 = 12
3) (2+1) + (7+1) = 3 + 8 = 11
4) (4+1) + (7+8) = 5 + 15 = 20