(-1/7)÷1/42×5/6÷(-5/8) = (-1/7)*42 *(5/6) *(-8/5) = -6 *(5/6)*(-8/5) =8 (-1/2+2/3-1/4)×(-12) =(-6 +8 -3)/12 *(-12) = 1
(-1/7)÷1/42×5/6÷(-5/8)=? (-1/2+2/3-1/4)×(-12)=? 急求过程!!
2个回答
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