简便计算 99乘50分之21
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:2024/05/11 12:54:42
简便计算 99乘50分之21
99 * (21/50)
= (100-1) * (21/50)
= (100 * 21)/50 - 21/50
= 42 - 21/50
= 42 - 0.42
= 41.58
= (100-1) * (21/50)
= (100 * 21)/50 - 21/50
= 42 - 21/50
= 42 - 0.42
= 41.58