Question

23+19=	50-17=	11.7+13=	2.2×0.2=	3 4 - 1 4 =
1 3 × 3 8 =	3 7 ÷ 3 5 =	1 4 + 1 5 =	7 8 + 1 8 =	4 9 ÷ 4 7 =
1 3 + 1 5 =	15× 3 5 =	10-0.6=	28.4÷0.4=	1 2 - 1 3 =

Answer 1

分析：本题据计算法则计算即可．

解答：解：23+19=42        50-17=33       11.7+13=24.7        2.2×0.2=0.44         

3

4

-

1

4

=

1

2

1

3

×

3

8

=

1

8

       

3

7

÷

3

5

=

5

7

       

1

4

+

1

5

=

9

20

           

7

8

+

1

8

=1                

4

9

÷

4

7

=

7

9

1

3

+

1

5

=

8

15

      15×

3

5

=9       10-0.6=9.4          28.4÷0.4=71          

1

2

-

1

3

=

1

6

点评：完成本题要细心，找出每组数据的特点，快速准确的得出题目．