20202021×20212020-20202020×20212021简便计算怎么做?
4个回答
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根据题目的简便计算,可以这样计算。
20202021×20212020-20202020×20212021
=20202020×20212020+20212020-20202020×20212020-20202020
=20212020-20202020
=10000
20202021×20212020-20202020×20212021
=20202020×20212020+20212020-20202020×20212020-20202020
=20212020-20202020
=10000
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展开全部
解:20202021X20212020-20202020X20212021=(20202020+1)X20212020-20202020X(20212020+1)=20202020X20212020+1X20212020-20212020X20202020-20202020X1=20212020-20202020=10000
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展开全部
20202021x20212020-20202020x20212021
=20202021x20212020-20202021x20212021+20212021
=20202021(20212020-20212021)+20202021+10000
=-20202021+20202021+10000
=10000
=20202021x20212020-20202021x20212021+20212021
=20202021(20212020-20212021)+20202021+10000
=-20202021+20202021+10000
=10000
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