(125+15)×8=用简便方法计算,还有48×73+48×27,32×125,125×(100+8),(125×25)
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/06/25 12:26:24
(125+15)×8=用简便方法计算,还有48×73+48×27,32×125,125×(100+8),(125×25)×4
![(125+15)×8=用简便方法计算,还有48×73+48×27,32×125,125×(100+8),(125×25)](/uploads/image/z/489179-11-9.jpg?t=%28125%2B15%29%C3%978%3D%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%2C%E8%BF%98%E6%9C%8948%C3%9773%2B48%C3%9727%2C32%C3%97125%2C125%C3%97%EF%BC%88100%2B8%29%2C%28125%C3%9725%EF%BC%89)
(125+15)×8=125×8+15×8=1000+120=1120
48×73+48×27=,48×(73+27)=48×100=4800
32×125,=4×8×125=4×1000=4000
125×(100+8)=125×100+125×8=12500+1000=13500
,(125×25)×4=125×(25×4)=125×100=12500
再问: 还有一题35×68+35×36-4×35
再答: 35×68+35×36-4×35 =35×(68+36-4) =35×100=3500
48×73+48×27=,48×(73+27)=48×100=4800
32×125,=4×8×125=4×1000=4000
125×(100+8)=125×100+125×8=12500+1000=13500
,(125×25)×4=125×(25×4)=125×100=12500
再问: 还有一题35×68+35×36-4×35
再答: 35×68+35×36-4×35 =35×(68+36-4) =35×100=3500