56乘以199加56怎么简便?201乘以38减38怎么简便?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/08 13:36:22
56乘以199加56怎么简便?201乘以38减38怎么简便?
![56乘以199加56怎么简便?201乘以38减38怎么简便?](/uploads/image/z/5417807-23-7.jpg?t=56%E4%B9%98%E4%BB%A5199%E5%8A%A056%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%3F201%E4%B9%98%E4%BB%A538%E5%87%8F38%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%3F)
56*199+56 = 56*(199+1) = 56*200 = 11200
201*38-38 = (201-1)*38 = 200*38 = 7600
201*38-38 = (201-1)*38 = 200*38 = 7600