简便算法38×17+18×63-18

简便算法38×17+18×63-18
2025-02-24 12:45:41
推荐回答(2个)
回答1:

38×17+18×63-18

=38x(18-1)+18(63-1)

=38x18-38+18x62
=18(38+62)-38
=18x100-38
=1800-38
=1762

回答2:

38X17+18X63-18
=20X17+18X(17+63)-18
=340+18X80-18
=340+1440-18
=1780-18
=1762