Question

3 4 - 1 2 = 1 1 5 + 1 4 = 2 1 3 -1.5= 1 2 -0.5+ 1 4 =

1 2 3 × 4 5 = 3 3 5 ÷3 3 5 = 1.8×3 1 3 = 2 3 × 3 4 ÷ 1 6 =

3 7 ÷1 1 2 = 5 9 ×2.7= 0.5÷ 1 3 = 1 1 3 -1 1 3 × 1 4 =

2.5÷ 1 4 = 1÷1 2 5 = 2 5 ×0.1=

Answer 1

分析：（1）（5）通分計(jì)算；（2）把帶分?jǐn)?shù)化為假分?jǐn)?shù)，約分即可；（3）（14）把除法改為乘法，約分即可；（4）（12）把分?jǐn)?shù)化為小數(shù)計(jì)算；（6）一個(gè)數(shù)除以本身等于1；（7）約分計(jì)算：（8）除以一個(gè)數(shù)等于乘這個(gè)數(shù)的倒數(shù)；（9）把小數(shù)化為分?jǐn)?shù)計(jì)算；（10）把帶分?jǐn)?shù)化為甲方念書(shū)，約分計(jì)算；（11）把除法改為乘法計(jì)算；（13）把小數(shù)化為分?jǐn)?shù)計(jì)算；（15）先算乘法，再算減法．

解答：解：

3

4

-

1

2

=

1

4

；           1

2

3

×

4

5

=

4

3

；               

3

7

÷1

1

2

=

2

7

；              2.5÷

1

4

=10；
1

1

5

+

1

4

=

29

20

；           3

3

5

÷3

3

5

=1；              

5

9

×2.7=1.5；            1÷1

2

5

=

5

7

；
2

1

3

-1.5=

5

6

；             1.8×3

1

3

=6；               0.5÷

1

3

1.5；             

2

5

×0.1=0.04；

1

2

-0.5+

1

4

=

1

4

；          

2

3

×

3

4

÷

1

6

=3；              1

1

3

-1

1

3

×

1

4

=1．

點(diǎn)評(píng)：此題考查了分?jǐn)?shù)的乘法和除法，根據(jù)題目特點(diǎn)，靈活計(jì)算．