问题 解答题
脱式计算.(能简算的要简算)
①14×75-624÷39
5
7
÷9+
4
7
×
1
9

2
3
+(
5
6
-
3
4
)÷
3
8

7
11
÷[
2
5
-(1-
7
10
)].
答案

①14×75-624÷39

=1050-16,

=1034;

5
7
÷9+
4
7
×
1
9

=

5
7
×
1
9
+
4
7
×
1
9

=(

5
7
+
4
7
)×
1
9

=

9
7
×
1
9

=

1
7

2
3
+(
5
6
-
3
4
)÷
3
8

=

2
3
+
1
12
×
8
3

=

2
3
+
2
9

=

8
9

7
11
÷[
2
5
-(1-
7
10
)].

=

7
11
÷[
2
5
-
3
10
],

=

7
11
÷
1
10

=

70
11

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