3÷2 = 1+1÷2 = 1,5, 90 хвилин
1) 60(6+3÷4) = 405 хв.
2) 405×2÷9 = 90 хв.
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3÷2 = 1+1÷2 = 1,5, 90 хвилин
1) 60(6+3÷4) = 405 хв.
2) 405×2÷9 = 90 хв.