可以这样做,2020+2021+2022=2021x 3,2021x 3+2021x 7=2021x 10=20210。
2020+2021+2022+2021*7=20 210
=2020+2021+2022+2021x(2+5)
=2020+2021+2022+4042+10105
=4041+4042+2022+10105
=8083+2022+10105
=10105+10105
=20210
还可以=2020+2021+(2020+2)+2021x(2+2+2+1)
=2021x5
=10105
=2020x4
=8084+2021+10105
=20210
这个应该是这样做
=(2020+2021+2021+1)+2021×7
=2021×3+2021×7
=2021×(3+7)
=20210
2020 +2021 +2022 +2021×7的简便运算怎么做?
2020 +2021 +2022 +2021×7
2020+2021+2022+2021×7
=2021-1+2021+2021+1+2021×7
=2021×3+2021×7
=2021×(3+7)
=2021×10
=20210
2020+2021+2022+2021×7
=2021×3+2021×7
=2021×(3+7)
=2021×10
=20210