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=568458*98=(60-2)(100-2)=6000-200
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