脱式计算,能简算的要简算. 1 2 -( 3 4 - 3 8 ) 2 3 +( 1 2 - 1 6 ) 3 14 + 5
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(1)

1

2 -(

3

4 -

3

8 ),

=

1

2 -

3

8 ,

=

1

8 ;

(2)

2

3 +(

1

2 -

1

6 ),

=

2

3 +

1

3 ,

=1;

(3)

3

14 +

5

13 +

8

13 ,

=

3

14 +(

5

13 +

8

13 ),

=

3

14 +1,

=1

3

14 ;

(4)

4

9 +

1

7 +

5

9 +

6

7 ,

=(

4

9 +

5

9 )+(

1

7 +

6

7 ),

=1+1,

=2;

(5)4

7

8 -

7

11 +

1

8 -

4

11 ,

=(4

7

8 +

1

8 )-(

7

11 +

4

11 ),

=5-1,

=4;

(6)

3

5 -

11

20 +

3

4 ,

=

1

20 +

3

4 ,

=

4

5 .

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