问题
解答题
解比例.
|
答案
(1)
:x=9 5
:3 10
,19 4
x=3 10
×9 5
,19 4
x÷3 10
=3 10
×9 5
÷19 4
,3 10
x=28.5;
(2)
=x 0.6
,2.8 4.2
4.2x=0.6×2.8,
4.2x÷4.2=1.68÷4.2,
x=0.4.
解比例.
|
(1)
:x=9 5
:3 10
,19 4
x=3 10
×9 5
,19 4
x÷3 10
=3 10
×9 5
÷19 4
,3 10
x=28.5;
(2)
=x 0.6
,2.8 4.2
4.2x=0.6×2.8,
4.2x÷4.2=1.68÷4.2,
x=0.4.