问题 解答题
用你喜欢的方法算:
1
4
+
3
4
×
1
3

5
7
×
1
4
+
3
4
×
5
7
7
8
×9+
7
8
10
21
÷
25
12
×
7
8
3
5
+
3
4
)÷
3
5
3
7
÷
7
11
+
4
7
×
11
7
答案

(1)

1
4
+
3
4
×
1
3

=

1
4
+
1
4

=

1
2

(2)

5
7
×
1
4
+
3
4
×
5
7

=(

1
4
+
3
4
)×
5
7

=1×

5
7

=

5
7

(3)

7
8
×9+
7
8

=(9+1)×

7
8

=10×

7
8

=

35
4

(4)

10
21
÷
25
12
×
7
8

=

10
21
×
7
8
×
12
25

=

1
5

(5)(

3
5
+
3
4
)÷
3
5

=

3
5
÷
3
5
+
3
4
×
5
3

=1+1

1
4

=2

1
4

(6)

3
7
÷
7
11
+
4
7
×
11
7

=

3
7
×
11
7
+
4
7
×
11
7

=(

3
7
+
4
7
)×
11
7

=1×

11
7

=

11
7

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