如题所述
拆分,2019-881=2019-(881+19)+19=2019-1000+19=1019+19=1038
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第1个回答 2021-04-04
2019-881=1138
第2个回答 2021-04-04
简便方法计算:
2019-881
=2000+19-(900-19)
=2000-900+19+19
=1100+38
=1138
2019-881
=2000+19-(900-19)
=2000-900+19+19
=1100+38
=1138
第3个回答 2023-03-27
2019-881
=2019-(881+19)+19
=2019-900+19
=1119+19
=1138
=2019-(881+19)+19
=2019-900+19
=1119+19
=1138
第4个回答 2021-04-04
2019-881
=2019-900+19
=1119+19
=1138
=2019-900+19
=1119+19
=1138