Question

口算． 4 5 + 1 5 =	5 8 - 1 8 =	4.3-1.6=	1 9 + 1 10 =
1- 1 5 =	1 2 - 1 5 =	2- 3 4 =	1 4 + 3 8 =

Answer 1

分析：根據分數加減法、小數減法的運算方法進行計算即可得到答案．

解答：解：

4

5

+

1

5

=1              

5

8

-

1

8

=

1

2

            4.3-1.6=2.7             

1

9

+

1

10

=

19

90

1-

1

5

=

4

5

                 

1

2

-

1

5

=

3

10

            2-

3

4

=1

1

4

                  

1

4

+

3

8

=

5

8

．

點評：此題主要考查的是分數加減法和小數減法的計算方法．