题目

12道有理数计算（写步骤）!
（-8/7)X0.25X(-1/4)X9
(-3/2)-(+1/2)-(-5/6)-(-1/3)
|5/6-5/7|-5/6-2/7
-8X(1/6-5/12+3/10)X15
1/42÷（2/7+1/6-3/14+2/3)
(-2/7-1/6+3/14+3/2)÷(-1/42)
60X3/7-60X1/7+60X5/7
-3÷(-2又2/3)÷(-1又1/8)
(-3又1/2)÷(-1又1/4)÷8/5
-8X(-1又2/3)X(-0.125)÷3/5
-3/5X(-3又2/1)÷（1又1/4）÷3
-0.25X0.5X(-3又1/5)X4

提问时间：2020-08-03

答案

1.（-8/7)X0.25X(-1/4)X9 = （8/7) * （1/4）*(1/4) *9 = （2/7）*(1/4) *9 = 1/14 *9 =9/14 2.(-3/2)-(+1/2)-(-5/6)-(-1/3) =(-3/2 -1/2) + (5/6 +1/3) = -2 + 7/6 = 1/6.3.|5/6-5/7|-5/6-2/7 =(5/6 -5/7) -5/6 -2/...