Question

по действиям каждый пример
2,25×(9 11/18-7/5)-8 1/3:3 1/3=




(6-2 4/5)×3 1/8-1 3/5:1/4=






5-(3-1 7/20) : 9/25+1/8=





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Answer 1

Ответ:

2,25×(9 11/18 - 7,5) - 8 1/3 ÷ 3 1/3 = 7

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1) 9 11/18 - 7 1/2 = 173/18 - 15/2 = 173/18 - 135/18 = 38/18 = 19/9  

2) 19/9 × 2 1/4 = 19/9 × 9/2 = 19/2

3) 8 1/3 ÷ 3 1/3 = 25/3 × 3/10 = 5/2 = 2,5

4) 19/2 - 2 1/2 = 19/2 - 5/2 = 14/2 = 7

Пошаговое объяснение: