怎么算86乘以84的简便算法

2024-12-27 00:16:48
推荐回答(3个)
回答1:

86x15+86x84+86 =86×(15+84+1) =86×100 =8600

回答2:

86x84
=(100-10-4)x84
=8400-840-336
=8400-1176
=7224

回答3:

86X84
=80X90+6X4
=7200+24
=7224