谁请uu女游三亚
幼苗
共回答了21个问题采纳率:100% 举报
1、(80+4)×25 2、523-257+157 3、417-(117+95)
=80×25+4×25 =266+157 =417-117-95
=2000+100 =423 =205
=2100
4、80×32+320×2 6、45×98+90 7、101×123-123
=80x32+320除以10x20x10 =45x98+45x2 =(100+1)x123-123
=80x32+32x20 =45(98+2) =100x123+1x123-123
=(80+20)x32 =45×100 =12300
=100x32 =4500
=3200
8、216×99
=216x(100-1)
=216x100-216x1
=21384
1年前
6