问题 解答题
选择你喜欢方法计算.
24-24×
5
6
9
10
×
3
5
5
12
÷
5
9
70.8-1.25-1.75
11
9
×3.8-3.8×
2
9
3
8
+
2
3
)÷
1
24
答案

(1)24-24×

5
6

=24-20

=4,

(2)5÷

9
10
×
3
5

=5×

10
9
×
3
5

=

10
3

(3)4×

5
12
÷
5
9

=4×

5
12
×
9
5

=3,

(4)70.8-1.25-1.75,

=70.8-(1.25+1.75),

=70.8-3,

=77.8,

(5)

11
9
×3.8-3.8×
2
9

=3.8×(

11
9
-
2
9
),

=3.8×1,

=3.8.

(6)(

3
8
+
2
3
)÷
1
24

=(

3
8
+
2
3
)×24,

=

3
8
×24+
2
3
×24,

=9+16,

=25.

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