Question

计算：(1)-5-3.5除以八分之七乘负七分之四(2)负四减［一减（一减零点五乘三分之一）］乘二减九.急阿,...

Answer 1

(1)

-5-3.5÷7/8×(-4/7)

=-5+7/2×8/7×4/7

=-5+16/7

=-19/7

(2)

-4-[1-(1-0.5×1/3)]×2-9

=-13-[1-(1-1/6)]×2-9

=-13-(1-1+1/6)×2

=-13-1/6×2

=-13-1/3

=-40/3