解比例:12:21=x:1416x:34=7:1.40.6:x=5%:562.7x=9100.16:25=825:x34:78=x:0.1x:32.5=25:612x:2.5=1:253:8=34:x5.4x=1.810.-数学
1 |
6 |
15 |
4 |
1 |
6 |
1 |
6 |
15 |
4 |
1 |
6 |
x=
45 |
2 |
(3)0.6:x=5%:
5 |
6 |
5%x=0.6×
5 |
6 |
5%x=0.5
5%x÷5%=0.5÷5%
x=10;
(4)
2.7 |
x |
9 |
10 |
9x=2.7×10
9x=27
9x÷9=27÷9
x=3;
(5)0.16:
2 |
5 |
8 |
25 |
0.16x=
2 |
5 |
8 |
25 |
0.16x=
16 |
125 |
0.16x÷0.16=
16 |
125 |
x=
4 |
5 |
(6)
3 |
4 |
7 |
8 |
7 |
8 |
3 |
4 |
7 |
8 |