问题
解答题
解比例. ①
④4:4.5=
|
答案
①
=0.7 x
,14 5
14x=0.7×5,
14x÷14=3.5÷4,
x=0.25;
②0.75:
=12:x,1 2
0.75x=
×12,1 2
0.75x÷0.75=6÷0.75,
x=8;
③
:2 15
=x:1 6
,2 3
x=1 6
×2 15
,2 3
x÷1 6
=1 6
÷4 45
,1 6
x=
;8 15
④4:4.5=
,x 27
4.5×
=4,x 27
x÷1 6
=4÷1 6
,1 6
x=24;
⑤
:2 3
=x:9,5 6
x=5 6
×9,2 3
x÷5 6
=6÷5 6
,5 6
x=
;36 5
⑥6.5:x=3.25:4.
3.25x=6.5×4,
3.25x÷3.25=26÷3.25,
x=8.