问题
解答题
|
答案
(1)X-
=2 7
,5 18
X-
+2 7
=2 7
+5 18
,2 7
x=
;71 126
(2)
+X=2 5
,5 6
+x-2 5
=2 5
-5 6
,2 5
x=
;13 30
(3)3x=4,
3x÷3=4÷3,
x=1
;1 3
(4)X÷0.4=0.16,
X÷0.4×04=0.16×0.4,
x=0.064.
|
(1)X-
=2 7
,5 18
X-
+2 7
=2 7
+5 18
,2 7
x=
;71 126
(2)
+X=2 5
,5 6
+x-2 5
=2 5
-5 6
,2 5
x=
;13 30
(3)3x=4,
3x÷3=4÷3,
x=1
;1 3
(4)X÷0.4=0.16,
X÷0.4×04=0.16×0.4,
x=0.064.