问题
解答题
计算下面各题,能简算的用简便方法计算 2272-6360÷24 [6.85-(0.65+0.7)]÷2.5 (
(
|
答案
(1)2272-6360÷24
=2272-265,
=2007;
(2)[6.85-(0.65+0.7)]÷2.5
=[6.85-1.35]÷2.5,
=5.5÷2.5,
=2.2;
(3)(
-9 10
×4 5
)÷5 8 5 12
=(
-9 10
)×1 2
,12 5
=
×2 5
,12 5
=
;24 25
(4)(
+5 8
)×8+1 27 19 27
=
×8+5 8
×8+1 27
,19 27
=8+(
+8 27
),19 27
=8+1,
=9.