如题所述
第1个回答 2021-04-02
68×56－58
=58×56+10×56－58
=58×(56－1)+560
=58×55+560
=58×50+58×5+560
=2900+290+560
=2900+850
=3750本回答被网友采纳
=58×56+10×56－58
=58×(56－1)+560
=58×55+560
=58×50+58×5+560
=2900+290+560
=2900+850
=3750本回答被网友采纳
第2个回答 2021-04-02
先算68乘以56再算减58
第3个回答 2023-03-23
68×56-58
=(70-2)×(60-4)-60+2
=4200-120-280+8-60+2
=4210-460
=3750
=(70-2)×(60-4)-60+2
=4200-120-280+8-60+2
=4210-460
=3750
第4个回答 2021-04-11
68×56－58
=68×56－68+10
=68×55+10
=68×50+68×5+10
=3400+340+10
=3750
=68×56－68+10
=68×55+10
=68×50+68×5+10
=3400+340+10
=3750
第5个回答 2021-04-02
68*56-58
=3808-58
=3750
=3808-58
=3750
