问题
解答题
|
答案
(1)X:25=
,2 5
5x=25×2,
5x÷5=50÷5,
x=10;
(2)5X-5×
=0.8,1 3
5x-
+5 3
=0.8+5 3
,5 3
5x÷5=
÷5,37 15
x=
; 37 75
(3)
-4.5+5.5=10,X 8
-4.5+5.5+4.5-5.5=10+4.5-5.5,X 8
×8=9×8,X 8
X=72.
|
(1)X:25=
,2 5
5x=25×2,
5x÷5=50÷5,
x=10;
(2)5X-5×
=0.8,1 3
5x-
+5 3
=0.8+5 3
,5 3
5x÷5=
÷5,37 15
x=
; 37 75
(3)
-4.5+5.5=10,X 8
-4.5+5.5+4.5-5.5=10+4.5-5.5,X 8
×8=9×8,X 8
X=72.