计算下面各题,怎样简便就怎样计算.

1个回答

  • ①15.28+

    12

    37 -(

    25

    37 +4.28 ),

    =15.28+

    12

    37 -

    25

    37 -4.28,

    =15.28-4.28+(

    12

    37 -

    25

    37 ),

    =11-

    13

    37 ,

    =10

    24

    37 ;

    ②(

    4

    3 -

    1

    2 )÷(1÷25%-

    1

    4 ),

    =

    5

    6 ÷(1÷

    1

    4 -

    1

    4 ),

    =

    5

    6 ÷(4-

    1

    4 ),

    =

    5

    6 ÷

    15

    4 ,

    =

    5

    6 ×

    4

    15 ,

    =

    2

    9 ;

    ③ 1

    2

    3 -[(3.62×

    2

    15 +6.38÷7

    1

    2 )×1.82-1

    1

    3 ×0.82] ,

    =1

    2

    3 -[(3.62×

    2

    15 +6.38×

    2

    15 )],

    =1

    2

    3 -[(3.62+6.38)×

    2

    15 ],

    =1

    2

    3 -[10×

    2

    15 ],

    =1

    2

    3 -1

    1

    3 ,

    =

    1

    3 ;

    ④(1-

    4

    97 )×

    18

    19 +

    31

    97 ÷

    19

    43 ,

    =(1-

    4

    97 )×

    18

    19 +

    31

    97 ×

    43

    19 ,

    =

    93

    97 ×

    18

    19 +

    31

    97 ×

    43

    19 ,

    =

    31×3

    97 ×

    18

    19 +

    31

    97 ×

    43

    19 ,

    =

    31

    97 ×(3×

    18

    19 +

    43

    19 ),

    =

    31

    97 ×(

    54

    19 +

    43

    19 ),

    =

    31

    97 ×

    97

    19 ,

    =

    31

    19 .