Question

（2012?石渠县模拟）口算．4+

1

5

=

4

1

5

    

1

3

×

1

5

=

1

15

     4.5÷

1

2

=

9

       

7

12

×2.4=

1.4

4

5

÷7=

4

35

         

1

3

-

1

5

=

2

15

     

1

2

+

1

7

=

9

14

          

9

10

×

2

3

=

3

5

．

Answer 1

分析：根据分数的加减乘除计算法则进行计算即可．

解答：口算．4+

1

5

=4

1

5

    

1

3

×

1

5

=

1

15

     4.5÷

1

2

=9       

7

12

×2.4=1.4

4

5

÷7=

4

35

         

1

3

-

1

5

=

2

15

     

1

2

+

1

7

=

9

14

          

9

10

×

2

3

=

3

5

．

点评：此题主要考查分数的加减乘除的计算法则．