问题 解答题
计算下面各题.(能简便的就简便)
7
15
×14+
7
15
7
12
+
1
24
÷
1
2
9
28
×14×
4
9
12÷
5
6
×
5
12
14
5
÷
2
5
÷
1
7
1
4
÷
5
6
×
5
12
5
14
+
5
7
÷
6
7
1
3
×
4
5
-
5
7
答案

(1)

7
15
×14+
7
15

=

7
15
×(14+1)

=

7
15
×15

=7;

(2)(

7
12
+
1
24
÷
1
2

=

7
12
×2+
1
24
×
2

=

7
6
+
1
12

=1

1
4

(3)

9
28
×14×
4
9

=

9
28
×
4
9
×14

=

1
7
×14

=2;

(4)12÷

5
6
×
5
12

=12×

5
12
÷
5
6

=5÷

5
6

=6;

(5)

14
5
÷
2
5
÷
1
7

=

14
5
÷(
2
5
×
1
7

=

14
5
÷
2
35

=49;

(6)

1
4
÷
5
6
×
5
12

=

3
10
×
5
12

=

1
8

(7)(

5
14
+
5
7
÷
6
7

=

15
14
÷
6
7

=1

1
4

(8)

1
3
×(
4
5
-
5
7

=

1
3
×
3
35

=

1
35

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