怎样简便怎样算3÷ 3 7 - 3 7 ÷3   ( 1 3 - 1 6 + 1 4 )×12   11 20 ÷[ 1
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(1)3÷

3

7 -

3

7 ÷3,

=3×

7

3 -

3

7 ×

1

3 ,

=7 -

1

7 ,

= 6

6

7 ;

(2)(

1

3 -

1

6 +

1

4 )×12,

=

1

3 ×12-

1

6 ×12+

1

4 ×12,

=4-2+3,

=5;

(3)

11

20 ÷[

1

2 ×(

2

3 +

4

5 )],

=

11

20 ÷[

1

2 ×

2

3 +

1

2 ×

4

5 ],

=

11

20 ÷[

1

3 +

2

5 ],

=

11

20 ×

15

11 ,

=

3

4 ;

(4)0.625×(8.3-2.5×12%),

=0.625×(8.3-0.3),

=

5

8 × 8,

=5;

(5)6.8×2.5+2.5×3.2,

=(6.8+3.2)×2.5,

=10×2.5,

=25;

(6)

7

4 ×

5

8 +

1

4 ÷

8

5

=

7

4 ×

5

8 +

1

4 ×

5

8 ,

=(

7

4 +

1

4 )×

5

8 ,

=

8

4 ×

5

8 ,

=

5

4 ,

= 1

1

4 .

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