问题 解答题
怎样算简便就怎样算.
1
3
×7÷
2
3

(
7
8
+
7
6
4
21

1
4
÷
5
8
+
3
4
÷
5
8
答案

(1)

1
3
×7÷
2
3

=

1
3
×7×
3
2

=

7
2

(2)(

7
8
+
7
6
)×
4
21

=

7
8
×
4
21
+
7
6
×
4
21

=

1
6
+
2
9

=

7
18

(3)

1
4
÷
5
8
+
3
4
÷
5
8

=(

1
4
+
3
4
)÷
5
8

=1÷

5
8

=

8
5

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