简便计算498^2=

问题描述:

简便计算498^2=

498^2=(500-2)^2
=500^2-2*500*2+2^2
=250000-2000+4
=248000+4
=248004

=(500-2)×2
=500×2-2×2
=1000-4
=996
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498^2
=(500-2)^2
=500^2-2x2x500+2^2
=250000-2000+4
=249804
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498^2=(500-2)²=500²-2x500x2+2²=250000-2000+4=248000+4=248004