问题 解答题
(1)(0.125×8-0.5)×4. (2)
9
20
÷6+
1
6
×
1
20
. (3)
5
6
×0.25+
1
4
×
1
6
. (4)28×
5
29
答案

(1)(0.125×8-0.5)×4,

=(1-0.5)×4,

=0.5×4,

=2;

(2)

9
20
÷6+
1
6
×
1
20

=

9
20
×
1
6
+
1
6
×
1
20

=

1
6
×(
9
20
+
1
20
),

=

1
6
×
1
2

=

1
12

(3)

5
6
×0.25+
1
4
×
1
6

=0.25×(

5
6
+
1
6
),

=0.25×1,

=0.25;

(4)28×

5
29

=(29-1)×

5
29

=29×

5
29
-1×
5
29

=5-

5
29

=4

24
29

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