45×45/46怎么简便运算

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45×45/46怎么简便运算
45×45/46怎么简便运算

45×45/46怎么简便运算
45*45/46
=(46-1)*45/46
=46*45/46-45/46
=45-45/46
=44+1/46
=44又1/46

45×45/46
=(46 - 1)×45/46
= 45 - 45/46
= 44又1/46

45*45即45的平方,也是(46-1)的平方,展开每项除以46,可得到结果

45*(1-1/46)=45-45/46=44+1/46