问题
解答题
用简便方法计算.(必须写出主要过程) (
|
答案
(1)(
-2 3
+1 2
)×24,3 8
=
×24-2 3
×24+1 2
×24,3 8
=16-12+9,
=13;
(2)1.1-
-4 11
-2 11
,5 11
=1.1-(
+4 11
+2 11
),5 11
=1.1-1,
=0.1.
用简便方法计算.(必须写出主要过程) (
|
(1)(
-2 3
+1 2
)×24,3 8
=
×24-2 3
×24+1 2
×24,3 8
=16-12+9,
=13;
(2)1.1-
-4 11
-2 11
,5 11
=1.1-(
+4 11
+2 11
),5 11
=1.1-1,
=0.1.