Question

Вычислите:
а)5 1/6+(3 1/4+2 1/6)÷2 3/5- 2/3×2 1/4
б) 8 8/9×2 1/8 +(7 1/3-6 7/8)÷3/4
в) 3 1/3 ×(2 3/45÷5 1/2)
г)(6 1/5- 4 1/3)÷ 1 1/3
Срочноо!
Помогите пожалуйста срочно надо
Даю 10 баллов пж Помогите ​

Answer 1

Ответ:

Пошаговое объяснение:

а)5 1/6+(3 1/4+2 1/6)÷2 3/5- 2/3×2 1/4 = 5 3/4

1) 3 1/4 + 2 1/6 = 3 3/12 + 2 2/12 = 5 5/12

2) 5 5/12 : 2 3/5 = 65/12 : 13/5 = 65/12 * 5/13 = 25/12

3) 2/3 * 2 1/4 = 2/3 * 9/4 = 3/2 = 1 1/2

4) 5 1/6 + 25/12 = 5 2/12 + 25/12 = 5 27/12 = 7 1/4

5) 7 1/4 - 1 1/2 = 7 1/4 - 1 2/4 = 5 3/4

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б) 8 8/9×2 1/8 +(7 1/3-6 7/8)÷3/4 = 19 1/2

1) 7 1/3 - 6 7/8 = 7 8/24 - 6 21/24 = 11/24

2) 8 8/9 * 2 1/8 = 80/9 * 17/8 = 170/9

3) 11/24 : 3/4 = 11/24 * 4/3 = 11/18

4) 170/9 + 11/18 = 340/18 + 11/18 = 351/18 = 19 1/2

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в) 3 1/3 ×(2 3/45÷5 1/2) = 10/3 * (31/15 : 11/2) = 10/3 * (31/15 * 2/11) = 10/3 * 62/165 = 124/99 = 1 25/99

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г)(6 1/5- 4 1/3)÷ 1 1/3 = (6 3/15 - 4 5/15) : 4/3 = 1 13/15 : 4/3 = 28/15 * 3/4 = 7/5 = 1 2/5