18×190用简便方法怎么计算

2025-04-06 20:35:35
推荐回答(4个)
回答1:

18x190
=18x(200-10)
=18x200-18x10
=3600-180
=3420
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回答2:

18×190
=18×(200-10)
=3600-180
=3420

回答3:

=20*190-2*190
=3800-380
=3420

回答4:

190*(20-2)=3800-380=3800-400+20=3420