Запишите и упростите разность выражений: 1) - 17,8 - х и у - 100,4; 2) к - 57,4 и d - 60 2/3; 3) - t + 30,1 и - к + 310 2/9; 4) - 90,7 - а и 81,4 - b
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(-17,8-х) - (у-100)= - 17,8-х-у+100=82,2-х-у(k-57,4)-(d-60 2/3)=k-57.4-d+60 2/3=k-d+60 2/3 - 57 2/5=k-d+60 10/15 - 57 6/15=k-d+3 4/15
(-t+30.1)-(-k+310 2/9)= - t+30 1/10+k-310 2/9=k-t+30 9/90 - 310 9/90=k-t - 280
(-90.7-a)-(81.4-b)=-90.7 - a-81.4+b=b - a - 172.1