7,8:(-2,6)+(-5,2)×(-5) -0,4×5/9+3/8:1, 1/2 помогите решить по действиям / дробь. Created by kirill0783. matematika-ru

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7,8:(-2,6)+(-5,2)×(-5) -0,4×5/9+3/8:1, 1/2 помогите решить по действиям / дробь

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svetlya4onok 7,8:(-2,6)=78/10:(-26/10)=78/1*(-1/26)=39/1*(-1/13)=3/1*(-1)=(-3)
(-5,2)*(-5)=52/10*5/1=52/2*1/1=26/1*1=26
0,4*5/9=4/10*5/9=4/2*1/9=2/1*1/9=2/9
3/8:1 1/2=3/8:3/2=3/8*2/3=1/4*1/3=1/12
(-3)+26-2/9+1/12=(-3/1)+26/1-2/9+1/12=108/36+936/36-8/36+3/36=1039/36=28 31/36

Ответ: 28 целых 31/36

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