问题
解答题
|
答案
(1)x-
=1 4
,1 2
x-
+1 4
=1 4
+1 2
,1 4
x=
;3 4
(2)x-
x=15,5 8
x÷3 8
=15÷3 8
,3 8
x=40;
(3)20%x=30,
20%x÷20%=30÷20%,
x=150.
|
(1)x-
=1 4
,1 2
x-
+1 4
=1 4
+1 2
,1 4
x=
;3 4
(2)x-
x=15,5 8
x÷3 8
=15÷3 8
,3 8
x=40;
(3)20%x=30,
20%x÷20%=30÷20%,
x=150.