899*901计算,5.02的平方计算,
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899*901计算,5.02的平方计算,
899*901计算,5.02的平方计算,
899*901计算,5.02的平方计算,
一楼的算错了
1、899*901
=(900-1)(900+1)
=900²-1
=810000-1
=809999
2、5.02²
=(5+0.02)²
=5²+2×5×0.02+0.02²
=25+0.2+0.0004
=25.2004
899*901
=(900-1)*(900+1)
=900*900-1
=810000-1
=809999
5.02
=(5+0.2)²
=5*5+2*5*0.2+0.2*0.2
=25+2+0.04
=27.04
1、899*901
=(900-1)(900+1)
=900²-1
=810000-1
=809999
2、5.02²
=(5+0.02)²
=5²+2×5×0.02+0.02²
=25+0.2+0.0004
=25.2004