大家帮下忙,这几道怎么简便计算?8.4+1.6/0.4*2.5 4/3+3/2*4/3+0.75*6/1 (这个的/是分号)800/1259.6*7/5(这个是分数)/9.6(这个/是除号)*1.445.6/3.8-7.6/3.8
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 11:35:16
![大家帮下忙,这几道怎么简便计算?8.4+1.6/0.4*2.5 4/3+3/2*4/3+0.75*6/1 (这个的/是分号)800/1259.6*7/5(这个是分数)/9.6(这个/是除号)*1.445.6/3.8-7.6/3.8](/uploads/image/z/15034454-62-4.jpg?t=%E5%A4%A7%E5%AE%B6%E5%B8%AE%E4%B8%8B%E5%BF%99%2C%E8%BF%99%E5%87%A0%E9%81%93%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%3F8.4%2B1.6%2F0.4%2A2.5+4%2F3%2B3%2F2%2A4%2F3%2B0.75%2A6%2F1+%28%E8%BF%99%E4%B8%AA%E7%9A%84%2F%E6%98%AF%E5%88%86%E5%8F%B7%29800%2F1259.6%2A7%2F5%EF%BC%88%E8%BF%99%E4%B8%AA%E6%98%AF%E5%88%86%E6%95%B0%EF%BC%89%2F9.6%EF%BC%88%E8%BF%99%E4%B8%AA%2F%E6%98%AF%E9%99%A4%E5%8F%B7%EF%BC%89%2A1.445.6%2F3.8-7.6%2F3.8)
大家帮下忙,这几道怎么简便计算?8.4+1.6/0.4*2.5 4/3+3/2*4/3+0.75*6/1 (这个的/是分号)800/1259.6*7/5(这个是分数)/9.6(这个/是除号)*1.445.6/3.8-7.6/3.8
大家帮下忙,这几道怎么简便计算?8.4+1.6/0.4*2.5 4/3+3/2*4/3+0.75*6/1 (这个的/是分号)
800/125
9.6*7/5(这个是分数)/9.6(这个/是除号)*1.4
45.6/3.8-7.6/3.8
大家帮下忙,这几道怎么简便计算?8.4+1.6/0.4*2.5 4/3+3/2*4/3+0.75*6/1 (这个的/是分号)800/1259.6*7/5(这个是分数)/9.6(这个/是除号)*1.445.6/3.8-7.6/3.8
800/125=800/(1000/8)=(800/1000)x8=6.4
(9.6*7/5)/9.6*1.4=9.6x(5/7)x(1/9.6)x(7/5)=1
45.6/3.8-7.6/3.8=3.8x(45.6-7.6)=144.4