问题
解答题
解比例:
9:2.5=3.6:x. |
答案
(1)
:x=2 3
:64 7
x=4 7
×62 3
x÷4 7
=4÷4 7 4 7
x=7;
(2)9:2.5=3.6:x
9x=2.5×3.6
9x÷9=9÷9
x=1.
解比例:
9:2.5=3.6:x. |
(1)
:x=2 3
:64 7
x=4 7
×62 3
x÷4 7
=4÷4 7 4 7
x=7;
(2)9:2.5=3.6:x
9x=2.5×3.6
9x÷9=9÷9
x=1.