有理数-1/2-26/5-1+15/3-4.5+7/3

题目

有理数-1/2-26/5-1+15/3-4.5+7/3
求结果和过程.

答案

-1/2-26/5-1+15/3-4.5+7/3
= -0.5-26/5-1+5-4.5+7/3
= -0.5-4.5 -1+5+(7/3 -26/5)
= -6 -1 +5 + (35- 78 ) /15
= -2 - 43/15
= -(30 + 43)/15
= - 15分之 73