问道有理数算术题-1²-【1又3/7+(-12)÷6】²×(-7/4)

问题描述:

问道有理数算术题
-1²-【1又3/7+(-12)÷6】²×(-7/4)

-7/5

1又7分之4

-1²-【1又3/7+(-12)÷6】²×(-7/4)
=-1²-[10/7+(-2)]²×(-7/4)
=-1²-[- 4/7]²×(-7/4)
=-1²-16/49×(-7/4)
=-1²+4/7
=-1+4/7
=-3/7