问题
解答题
|
答案
(1)(
+2 5
×6)÷5 9
,8 15
=(
+2 5
)×10 3
,15 8
=(
+6 15
)×50 15
,15 8
=
×56 15
,15 8
=7;
(2)[
-(1 4
-4 5
)]÷3 4
,3 25
=[
-(1 4
-16 20
)]×15 20
,25 3
=[
-1 4
]×1 20
,25 3
=
×1 5
,25 3
=
;5 3
(3)(
-1 2
)÷(1 4
+1 5
),1 2
=
÷(1 4
+2 10
),5 10
=
×1 4
,10 7
=
;5 14
(4)
÷(1 2
+1 4
)×3 5
,3 5
=
÷(1 2
+5 20
)×12 20
,3 5
=
÷1 2
×17 20
,3 5
=
×1 2
×20 17
,3 5
=
;6 17