问题 解答题
计算,能简算的要简算.
3
8
×4÷
3
8
×4
(36+
1
4
)×
1
4
4
15
÷5÷
4
5
1-
2
13
÷
8
13
-
3
4
答案

(1)

3
8
×4÷
3
8
×4,

=

3
8
×4×
8
3
×4,

=(

3
8
×
8
3
)×(4×4),

=1×16,

=16;

(2)(36+

1
4
)×
1
4

=36×

1
4
+
1
4
×
1
4

=9+

1
16

=9

1
16

(3)

4
15
÷5÷
4
5

=

4
15
×
1
5
×
5
4

=

4
15
×(
1
5
×
5
4
),

=

4
15
×
1
4

=

1
15

(4)1-

2
13
÷
8
13
-
3
4

=1-

1
4
-
3
4

=1-(

1
4
+
3
4
),

=1-1,

=0.

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