问题 解答题
下面各题怎样算简便就怎样算.
(1)36×
2
7
×
5
72
×42
(2)(
7
8
+
7
16
)÷
7
16
(3)
6
7
×
3
4
+
1
4
×
6
7
(4)
7
8
÷
2
3
÷
7
8
  
(5)
5
9
×8÷
7
9
(6)24×(
1
3
+
3
8
+
7
12
)
答案

(1)36×

2
7
×
5
72
×42

=(36×

5
72
)×(
2
7
×42)

=

5
2
×12

=30;

(2)(

7
8
+
7
16
)÷
7
16

=

7
8
×
16
7
+
7
16
×
16
7

=2+1

=3;

(3)

6
7
×
3
4
+
1
4
×
6
7

=

6
7
×(
3
4
+
1
4

=

6
7
×1

=

6
7

(4)

7
8
÷
2
3
÷
7
8

=

7
8
÷
7
8
÷
2
3

=1÷

2
3

=1

1
2

(5)

5
9
×8÷
7
9

=

40
9
÷
7
9

=

40
7

=5

5
7

(6)24×(

1
3
+
3
8
+
7
12
)

=24×

1
3
+24×
3
8
+24×
7
12

=8+9+14

=31.

选择题
问答题 简答题