问题
解答题
(1)0.25:x=7.5:15 (2)x:8=3:0.5 (3)8:x=
(4)6.5:x=3.25:4. |
答案
(1)0.25:x=7.5:15,
7.5x=0.25×15,
7.5x÷7.5=3.75÷7.5,
x=0.5;
(2)x:8=3:0.5,
0.5x=3×8,
0.5x÷0.5=24÷0.5,
x=48;
(3)8:x=
:3 4
,1 2
x=8×3 4
,1 2
x÷3 4
=4÷3 4
,3 4
x=
;16 3
(4)6.5:x=3.25:4,
3.25x=6.5×4,
3.25x÷3.125=26÷3.25,
x=8.