121 *3/4-3/8*40-0.75 (1/8+1/24+1/48+1/80+1/120+1/168)*56(7-11/16*3)+(1-11/16*7)+(5-11/16)+(3-11/16*5)*是乘号 11/16是十一分之十六
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 20:31:26
![121 *3/4-3/8*40-0.75 (1/8+1/24+1/48+1/80+1/120+1/168)*56(7-11/16*3)+(1-11/16*7)+(5-11/16)+(3-11/16*5)*是乘号 11/16是十一分之十六](/uploads/image/z/248381-53-1.jpg?t=121+%2A3%2F4-3%2F8%2A40-0.75+%EF%BC%881%2F8%2B1%2F24%2B1%2F48%2B1%2F80%2B1%2F120%2B1%2F168%EF%BC%89%2A56%EF%BC%887-11%2F16%2A3%EF%BC%89%2B%EF%BC%881-11%2F16%2A7%EF%BC%89%2B%EF%BC%885-11%2F16%EF%BC%89%2B%EF%BC%883-11%2F16%2A5%EF%BC%89%2A%E6%98%AF%E4%B9%98%E5%8F%B7+11%2F16%E6%98%AF%E5%8D%81%E4%B8%80%E5%88%86%E4%B9%8B%E5%8D%81%E5%85%AD)
121 *3/4-3/8*40-0.75 (1/8+1/24+1/48+1/80+1/120+1/168)*56(7-11/16*3)+(1-11/16*7)+(5-11/16)+(3-11/16*5)*是乘号 11/16是十一分之十六
121 *3/4-3/8*40-0.75 (1/8+1/24+1/48+1/80+1/120+1/168)*56
(7-11/16*3)+(1-11/16*7)+(5-11/16)+(3-11/16*5)
*是乘号 11/16是十一分之十六
121 *3/4-3/8*40-0.75 (1/8+1/24+1/48+1/80+1/120+1/168)*56(7-11/16*3)+(1-11/16*7)+(5-11/16)+(3-11/16*5)*是乘号 11/16是十一分之十六
1. 121*3/4-3/4*1/2*40-3/4
=(121-1/2*40-1)*3/4
=(120-20)*3/4
=100*3/4=75
2.(1/8+1/8*1/3+1/8*1/6+1/8*1/10+1/8*1/15+1/8*1/21)*56
=(1+1/3+1/6+1/10+1/15+1/21)*1/8*56
=(1+1/2+1/6+1/21)*7
=(5/3+1/21)*7
=36/21*7
=12
3.(7-11/16*3)+(1-11/16*7)+(5-11/16)+(3-11/16*5)
=7+1+5+3-11/16*3-11/16*7-11/16-11/16*5
=16-(3+7+1+5)*11/16
=16-16*11/16
=5
这几个题主要考察了混合运算的分配法 呵呵
75 12 5
无题