问题 解答题
脱式计算,能简算的要简算
7
9
×
11
5
+
2
9
×
11
5

1
4
+
5
6
-
2
3
)×24
4
5
+
1
4
)÷
7
3
+
7
10
答案

(1)

7
9
×
11
5
+
2
9
×
11
5

=(

7
9
+
2
9
)×
11
5

=1×

11
5

=

11
5

(2)(

1
4
+
5
6
-
2
3
)×24,

=

1
4
×24+
5
6
×24-
2
3
×24,

=6+20-16,

=26-16,

=10;

(3)(

4
5
+
1
4
)÷
7
3
+
7
10

=

21
20
÷
7
3
+
7
10

=

9
20
+
7
10

=

23
20

解答题
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