问题 解答题
计算下面各题,能简算的必须简算.
87×
3
86
5
6
×
1
15
÷
7
18
24×(
3
8
+
1
6
+
5
12
)
1
3
÷5+
2
3
×
1
5
2
9
×0.375÷
6
7
(
3
4
-
3
16
)×(
2
9
+
1
3
)
答案

(1)87×

3
86

=(86+1)×

3
86

=86×

3
86
+1×
3
86

=3+

3
86

=3

3
86

(2)

5
6
×
1
15
÷
7
18

=

1
18
×
18
7

=

1
7

(3)24×(

3
8
+
1
6
+
5
12

=24×

3
8
+24×
1
6
+24×
5
12

=9+4+10

=23;

(4)

1
3
÷5+
2
3
×
1
5

=

1
3
×
1
5
+
2
3
×
1
5

=(

1
3
+
2
3
)×
1
5

=1×

1
5

=

1
5

(5)

2
9
×0.375÷
6
7

=

2
9
×
3
8
÷
6
7

=

1
12
÷
6
7

=

7
72

(6)(

3
4
-
3
16
)×(
2
9
+
1
3

=

9
16
×
5
9

=

5
16

判断题
单项选择题