Question

(16,6-7 4/15)×6/7+(13,3-5,6)÷(-2,5)​

Answer 1

(16,6-7 4/15)×6/7+(13,3-5,6)÷(-2,5)​ = 9 13 × 67 + 7,7 : (-2,5) = 8+(-3,08) = 4,92

Answer 2

(16,6 - 7 4/15) · 6/7 + (13,3 - 5,6) : (-2,5) = 4,92

1) 16,6 - 7 4/15 = 16 9/15 - 7 4/15 = 9 5/15 = 9 1/3

2) 9 1/3 · 6/7 = 28/3 · 6/7 = (4·2)/(1·1) = 8

3) 13,3 - 5,6 = 7,7

4) 7,7 : (-2,5) = - 3,08

5) 8 + (-3,08) = 8 - 3,08 = 4,92

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Пояснения: 0,6 = 6/10 = 3/5 = 9/15

5/15 = 1/3 - сократили на 5

9 1/3 = (9·3+1)/3 = 28/3