简便运算.(1)27*3.4+0.154*34-8.1*0.34(2)[32-(1/3+1/5)*45]÷4/7

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/08 20:31:43

简便运算.(1)27*3.4+0.154*34-8.1*0.34(2)[32-(1/3+1/5)*45]÷4/7
简便运算.
(1)27*3.4+0.154*34-8.1*0.34
(2)[32-(1/3+1/5)*45]÷4/7

简便运算.(1)27*3.4+0.154*34-8.1*0.34(2)[32-(1/3+1/5)*45]÷4/7
1 .27*3.4+0.154*34-8.1*0.34
=(27+0.154-8.1) *0.34
=19.054*0.34
=6.47836
2.[32-(1/3+1/5)*45]÷4/7
=[32-(1/3*45+1/5*45)]÷4/7
=(32-15-9)÷4/7
=8*7/4
=14