Question

56+37=80-16=31.5+5=12-1.1=
2×0.2=2.87÷0.7=30÷50=25×8=

3

8

×

4

5

=

1

4

+

1

5

=

1

6

+

5

6

=

7

15

-

1

15

=

4

15

÷

2

5

=12×

2

3

=1÷

4

5

=0×

7

8

=

Answer 1

分析：根据小数、分数、整数四则运算的计算法则及混合运算的顺序进行计算即可．

解答：解：56+37=93；         80-16=64；                  31.5+5=36.5；                12-1.1=10.9
   2×0.2=0.4；        2.87÷0.7=4.1                30÷50=0.6；                 25×8=200；
  

3

8

×

4

5

=0.3；        

1

4

+

1

5

=0.45；                

1

6

+

5

6

=1；                   

7

15

-

1

15

=0.4；
 

4

15

÷

2

5

=

2

3

；         12×

2

3

=8；                   1÷

4

5

=1.25；                  0×

7

8

=0．

点评：本题主要考查小数、分数、整数四则运算及混合运算，要看清运算符号和数字．