问题
解答题
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答案
(1)14.4:x=18:5,
18x=14.4×5,
18x=72,
x=4;
(2)
=0.5 0.4
,x 0.6
0.4x=0.5×0.6,
0.4x=0.3,
x=0.75;
(3)
=9.6 x
,9 0.6
9x=9.6×0.6,
9x=5.76,
x=0.64;
(4)
=35 0.7
,x 21
0.7x=35×21,
0.7x=735,
x=1050;
(5)0.8:x=
:0.75,3 5
0.6x=0.8×0.75,
0.6x=0.6,
x=1;
(6)49:(5+x)=14:2,
14(5+x)=49×2, 14(5+x)=98, 5+x=7, x=2; (7)x:1.6=12: | ||||||
0.8x=1.6×12, 0.8x=19.2, x=24; | ||||||
(8) |
3 |
4 |
5 |
6 |
2 |
5 |
x=3 4
,1 3
x=
.4 9