Question

直接写得数 10÷ 5 3 =	1 2 - 2 5 =	4 5 × 5 7 =	4 5 ÷ 4 5 + 1 7 =
1÷ 3 8 =	9× 5 6 =	0.8- 3 4 =	2 3 ×1.2-0.2=

Answer 1

分析：根据分数的四则运算法则计算，结果化到最简．

解答：解：①10÷

5

3

=6；   ②

1

2

-

2

5

=

1

10

；  ③

4

5

×

5

7

=

4

7

；   ④

4

5

÷

4

5

+

1

7

=

8

7

；
⑤1÷

3

8

=

8

3

；    ⑥9×

5

6

=

15

2

；   ⑦0.8-

3

4

=0.05；   ⑧

2

3

×1.2-0.2=0.6．

点评：在计算时要细心，注意数据的特点．