Question

简便计算，（能简便的要简便） （17.2-0.4）÷0.4 4.25-4.25×0.8 0.125×0.07×0.8 0.84÷0.03-1.5

（0.24+X）×0.8=3.2 （解方程） 我很急，你们快一点
简便计算也要答 （17.2-0.4）÷0.4 4.25-4.25×0.8 0.125×0.07×0.8 0.84÷0.03-1.5 我很急很急，求求你们快一点 要过程，不要答案

Answer 1

解：1.0.24+x=3.2/0.8
0.24+x=4
x=4-0.24=3.76
2.（17.2-0.4）÷0.4
=17.2÷0.4-0.4÷0.4
=43-1
=42
3. 4.25-4.25×0.8
4.25×（1-0.8）
4.25×0.2
=0.85
4.0.125×0.07×0.8
=0.125×0.8×0.07
=0.1×0.07
=0.007
5.0.84÷0.03-1.5
=28-1.5
=26.5

Answer 2

0.24+x=3.2/0.8
0.24+x=4
x=4-0.24=3.76

Answer 3

（0.24+X）×0.8=3.2
0.24+x=4
x=3.76

Answer 4

http://www.sotichina.com/

Answer 5

简便计算42,0.85,0.007,26.5