问题 解答题
用简便方法计算.
(1)(
1
8
-
1
6
+
1
4
)×24

(2)
3
10
+3.9+0.7+
1
10
答案

(1)(

1
8
-
1
6
+
1
4
)×24,

=

1
8
×24-
1
6
×24+
1
4
×24,

=3-4+6,

=3+6-4,

=5;

(2)

3
10
+3.9+0.7+
1
10

=0.3+3.9+0.7+0.1,

=(0.3+0.7)+(3.9+0.1),

=1+4,

=5.

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