问题 解答题
-42×
3
7
+16×
1
3
-16×
4
7
答案

-42×

3
7
+16×
1
3
-16×
4
7

=-16×

3
7
+16×
1
3
-16×
4
7

=-16×(

3
7
+
4
7
-
1
3

=-16×

2
3

=-

32
3

名词解释
单项选择题