问题 解答题
36×
17
35
4
5
×
2
3
+
1
5
÷
3
4
12
5
×(
5
6
+
3
4
)
+
4
5
4
9
+
2
15
÷
2
15
1
5
÷3+
4
5
×
1
3
13
7
13
-(4
1
4
+3
7
13
答案

(1)36×

17
35

=(35+1)×

17
35

=35×

17
35
+1×
17
35

=17+

17
35

=17

17
35

(2)

4
5
×
2
3
+
1
5
÷
3
4

=

4
5
×
2
3
+
1
5
×
4
3

=

4
5
×
2
3
+
4
5
×
1
3

=

4
5
×(
2
3
+
1
3
),

=

4
5
×1,

=

4
5

(3)

12
5
×(
5
6
+
3
4
)
+
4
5

=

12
5
×
5
6
+
12
5
×
3
4
+
4
5

=2+

9
5
+
4
5

=2+(

9
5
+
4
5
),

=2+2

3
5

=4

3
5

(4)(

4
9
+
2
15
÷
2
15

=(

4
9
+
2
15
)×
15
2

=

4
9
×
15
2
+
2
15
×
15
2

=

10
3
+1,

=4

1
3

(5)

1
5
÷3+
4
5
×
1
3

=

1
5
×
1
3
+
4
5
×
1
3

=(

1
5
+
4
5
)×
1
3

=1×

1
3

=

1
3

(6)13

7
13
-(4
1
4
+3
7
13
),

=13

7
13
-4
1
4
-3
7
13

=13

7
13
-3
7
13
-4
1
4

=10-4

1
4

=5

3
4

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