问道有理数算术题
问题描述:
问道有理数算术题
-1²-【1又3/7+(-12)÷6】²×(-7/4)
答
-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