问题
解答题
解方程: (1)(
(2)59÷[1÷(
(3)
|
答案
(1)(
-1 3
)×6-7÷13,1 13
=
×6-1 3
×6-7÷13,1 13
=2-
-6 13
,7 13
=2-(
+6 13
),7 13
=2-1,
=1;
(2)59÷[1÷(
-9%)],1 10
=59÷[1÷(10%-9%)],
=59÷[1÷1%],
=59÷100,
=0.59;
(3)
x-3 4
+0.2=4 5
,1 2
x-3 4
+4 5
=1 5
,1 2
x-3 4
=3 5
,1 2
x=3 4
,11 10
x=
÷11 10
,3 4
x=
.22 15