Question

3 4 + 1 2 =	1 3 - 1 4 =	12× 3 4 =	1 5 ÷3=
2 7 ×14=	20÷ 4 9 =	2 3 × 7 8 =	0× 2 13 =
2 5 ÷ 3 2 =	1 2 ÷ 2 3 =	5 7 ÷1=	14× 5 7 ÷14× 5 7 =

Answer 1

分析：前兩題按分?jǐn)?shù)加減法的運(yùn)算法則計(jì)算，最后一題按從左到右的順序計(jì)算，其余題目按分?jǐn)?shù)乘除法的計(jì)算法則運(yùn)算．

解答：解：

3

4

+

1

2

=

5

4

        

1

3

-

1

4

=

1

12

                       12×

3

4

=9                     

1

5

÷3=

1

15

2

7

×14=4             20÷

4

9

=45                      

2

3

×

7

8

=

7

12

                   0×

2

13

=0

2

5

÷

3

2

=

4

15

           

1

2

÷

2

3

=

3

4

                     

5

7

÷1=

5

7

                     14×

5

7

÷14×

5

7

=

25

49

．

點(diǎn)評：最后一題要按運(yùn)算順序計(jì)算，不要被數(shù)字所迷惑寫成了1．