问题 解答题
脱式计算(能简算的要简算)
1.25×
3
7
×4×
7
15

8
17
×9
-8÷
17
8
  

4.28+
3
4
+5.72+
1
4
答案

(1)1.25×

3
7
×4×
7
15

=(1.25×4)×(

3
7
×
7
15
),

=5×

1
5

=1;

(2)

8
17
×9-8÷
17
8

=

8
17
×9-8×
8
17

=(9-8)×

8
17

=1×

8
17

=

8
17

(3)4.28+

3
4
+5.72+
1
4

=(4.28+5.72)+(

3
4
+
1
4
),

=10+1,

=11.

单项选择题
判断题