问题 解答题
8×(
1
2
-
2
5
)÷80%

50%÷
2
3
×
3
4
-37.5%

5
12
÷
7
12
-
2
3

(6.7×60%+3.3×60%)÷
1
4

10×(
8
5
-
3
8
÷37.5%)
答案

①原式=8×

1
10
×
100
80

=1;

②原式=

1
2
×
3
2
×
3
4
-
3
8

=

9
16
-
3
8

=

3
16

③原式=

5
12
×
12
7
-
2
3

=

5
7
-
2
3

=

1
21

④60%(6.7+3.3)×4

=60%×10×4

=24;

⑤原式=10×(

8
5
-
3
8
×
8
3

=10×(

8
5
-1)

=10×

3
5

=6.

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