问题
解答题
解比例.
|
答案
(1)7.5:x=2.5:12,
2.5x=7.5×12,
x=90÷2.5,
x=36;
(2)
:4 9
=x:15,1 6
x=15×1 6
,4 9
x×6=1 6
×6,20 3
x=40;
(3)
=Χ 6.5
,4 5.2
2x=6.5×4,
x=26÷2,
x=13.
解比例.
|
(1)7.5:x=2.5:12,
2.5x=7.5×12,
x=90÷2.5,
x=36;
(2)
:4 9
=x:15,1 6
x=15×1 6
,4 9
x×6=1 6
×6,20 3
x=40;
(3)
=Χ 6.5
,4 5.2
2x=6.5×4,
x=26÷2,
x=13.