问题
解答题
计算下面各题(能简便的简便) (
23-
(
|
答案
(1)(
+3 4
)×368 9
=
×36+3 4
×368 9
=27+32
=59;
(2)
×8 15
×1 3
=5 8
;1 9
(3)
×7 15
÷5 3 10 9
=
×7 15
×5 3 9 10
=
;7 10
(4)23-
×8 9
÷3 8 1 27
=23-
×8 9
×273 8
=23-9
=14;
(5)
÷(3 4
-0.25)×1 2 1 3
=
÷(3 4
-1 2
)×1 4 1 3
=
÷3 4
×1 4 1 3
=
×4×3 4 1 3
=1;
(6)(
×4 7
+1 5
×3 7
)÷1 5 8 15
=(
+4 7
)×3 7
×1 5 15 8
=1×
×1 5 15 8
=
.3 8