问题 解答题
脱式计算.
4
9
×
15
16
÷
5
4
(
2
3
+
2
15
)×45
(1-
1
10
×7)÷
1
5
3
4
×(
1
2
+
1
8
)÷5
答案

(1)

4
9
×
15
16
÷
5
4

=

5
12
÷
5
4

=

1
3

(2)(

2
3
+
2
15
)×45,

=

2
3
×45+
2
15
×45,

=30+6,

=36;

(3)(1-

1
10
×7)÷
1
5

=(1-

7
10
)÷
1
5

=

3
10
÷
1
5

=

3
2

(4)

3
4
×(
1
2
+
1
8
)÷5,

=

3
4
×
5
8
÷5,

=

15
32
÷5,

=

3
32

单项选择题
问答题 简答题