ОЧЕНЬ СРОЧНО ПОМОГИТЕ ПЖ

Question

ОЧЕНЬ СРОЧНО ПОМОГИТЕ ПЖ

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Answer 1

А) 5 + 2/3 * (- 2 1/2) = 5 + 2/3 * (- 3/2) = 5 + (-1) = 5 - 1 = 4
б) - 2 : 5 1/3 - 7/10 : 1 1/15 = - 2 : 16/3 - 7/10 : 16/15 = - 2 * 3/16 - 7/10 * 15/16 = - 3/8 - 7/2 * 3/16 = - 3/8 - 21/32 = - 12/32 - 21/32 = - 33/32
в) 3/7 - (1 1/4 - 1 1/8 * 2/9) = 3/7 - (1 1/4 - 9/8 * 2/9) = 3/7 - (1 1/4 - 1/4) = 3/7 - 1 = 3/7 - 7/7 = - 4/7

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