31*18-1590⼀15简便计算

2025-04-07 11:52:56
推荐回答(2个)
回答1:

31×18-1590÷15
=30×18+1×18-1500÷15-90÷15
=540+18-100-6
=440+12
=452

回答2:

31*18-1590/15
=558-106
=558-100-6
=458-6
=452