问题 解答题
计算下面各题.(能简算的要简算)
4
3
×
5
12
+
5
3
×
5
12
5
32
×
15
16
)÷
15
16
3
8
×
3
4
+
5
8
×
75%
(1+25%)÷(1-25%)
4
3
+
1
3
4
1
3
÷65%×4
1
3
×65%
答案

(1)

4
3
×
5
12
+
5
3
×
5
12

=(

4
3
+
5
3
5
12

=3×

5
12

=

5
4

(2)(

5
32
×
15
16
)÷
15
16

=(

5
32
×
15
16
)×
16
15

=

5
32
×(
15
16
×
16
15
),

=

5
32
×1,

=

5
32

(3)

3
8
×
3
4
+
5
8
×75%,

=

3
8
×0.75+
5
8
×0.75,

=(

3
8
+
5
8
)×0.75,

=1×0.75,

=0.75;

(4)(1+25%)÷(1-25%),

=1.25÷0.75,

=

5
3

(5)5×

4
3
+
1
3

=

20
3
+
1
3

=7;

(6)4

1
3
÷65%×4
1
3
×65%,

=(4

1
3
×4
1
3
)×(65%÷65%),

=

169
9
×1,

=

169
9

判断题
判断题