58×98怎么简算啊

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58×98怎么简算啊
58×98怎么简算啊

58×98怎么简算啊
58×98
=58×(100-2)
=58×100-58×2
=5800-116
=5684

58*98
=(60-2)(100-2)
=6000-200-120+4
=5684

58×98
=58×(100-2)
=58×100-58×2
=5800-116
=5684

=58*(100-2)
=5800-(60-2)*2
=5800-120+4
=5684

58(100-2)=5800-116=5684

可以先58*100,再减去58*2

(60-2)*(100-2)
=6000-120-200+4
=5684