31/42 - (-43/54) - (-79/81) + (-17/63) - (-37/63+67/81)

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Математика

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21 мая, 19:59

31/42 - (-43/54) - (-79/81) + (-17/63) - (-37/63+67/81)

+1

Ответы (1)

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Ферапонт · Answer 1

Раскроем скобки:

= 31/42 + 43/54 + 79/81 - 17/63 + 37/63 - 67/81 =

= (79/81 - 67/81) + (37/63 - 17/63) + 31/42 + 43/54 =

= 12/81 + 20/63 + 31/42 + 43/54 = 4/27 + 20/63 + 31/42 + 43/54 =

= 56/378 + 120/378 + 279/378 + 301/378 = 756/378 = 2

Ответ: 2.