问题
解答题
下面各题怎样简便就怎样算
|
答案
(1)
÷(2 5
-3 4
),3 5
=
÷2 5
,3 20
=
×2 5
,20 3
=
;8 3
(2)(1-
×1 4
)÷8 9
,14 15
=(1-
)×2 9
,15 14
=
×7 9
,15 14
=
;5 6
(3)
×16 27
+1 7
÷7,19 27
=
×16 27
+1 7
×19 27
,1 7
=(
+16 27
)×19 27
,1 7
=
×35 27
,1 7
=
;5 27
(4)(
+5 6
)×5 8
,24 25
=
×5 6
+24 25
×5 8
,24 25
=
+4 5
,3 5
=
.7 5