问题 解答题
简便计算.
(1)
7
41
×
1
31
+
34
41
÷31
(2)48×(
1
8
+
1
6
-
1
12

(3)
1
5
×37%+
4
5
×37%
答案

(1)

7
41
×
1
31
+
34
41
÷31,

=

7
41
×
1
31
+
34
41
×
1
31

=(

7
41
+
34
41
)×
1
31

=1×

1
31

=

1
31

(2)48×(

1
8
+
1
6
-
1
12
),

=48×

1
8
+48×
1
6
-
48×
1
12

=6+8-4,

=10;

(3)

1
5
×37%+
4
5
×37%,

=

1
5
×0.37+
4
5
×
0.37,

=(

1
5
+
4
5
)×0.37,

=1×0.37,

=0.37.

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