简便法128*960+8720*69
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 06:39:47
![简便法128*960+8720*69](/uploads/image/z/1738117-37-7.jpg?t=%E7%AE%80%E4%BE%BF%E6%B3%95128%2A960%2B8720%2A69)
简便法128*960+8720*69
简便法128*960+8720*69
简便法128*960+8720*69
128*960+8720*69
=240*(128*4+109*23)
=240*(512+(100+9)*23)
=240*(512+2300+207)
=240*3019
=240*(3000+19)
=720000+4560
=724560
128*690+8720*69 =128*690+872*10*69 =128*690+872*690 =690*(128+872) =690*1000 =690000 128x690+8720x69=1280x69+8720x69=(1280+