(27 – 514) –(486 – 73) = 27 – 514 – 486 + 73

= (27 + 73) – (514 + 486) = 100 – 1000 = -900

= 27 + 514 - 486 + 73

=(27 + 73) +(514 - 486 )

= 100 + 28 =128

(27+514)-(486-73)

=541-413

=128 

mình trước nha 

\(\text{(27+514)-(486-73)}\)

\(=27+514-486+73\)

\(=\left(27+73\right)+\left(514-486\right)\)

\(=100+28\)

\(=128\)

a)-7624+(1543+7624)=(-7624+7624)+1543=1543

b)(27-514)-(486-73)=27-514-486+73=(27+73)-(514-486)=100-28=72

(27-514)+(486-73)

-487+413

-74

(27-514)+(486-73)

=-487+413

=-74

(27+43)-( 514+486)=100-1000=-900

=27 - 514 + 486 - 73 = (27 + 73 ) - (514 - 486 ) = 100 -  28 = 72

(27-514)+(486-73)=27-514+486-73=(27-73+486)+(-514)=440+(-514)= -74

   ( 27 + 514 ) - ( -486 - 73 )

= 27 + 514 + 486 + 73

= ( 27 + 73 )  + ( 514 + 486 )

= 100 + 1000

= 1100

(27+514)-(486-73)

=(27+73)+(514-486)

=100+28

=128

= 27 - 514 - 486 + 73

= ( 27 + 73 ) - ( 514 + 486 )

= 100 - 1000

= -900

( 27 - 514 )-(486-73)

=(514+486) - (27 + 73)

= 1000 -100

= 900

\(\left(27-514\right)-\left(486-73\right)\)

\(=27-514-486+73\)

\(=\left(27+73\right)-\left(514+486\right)\)

\(=100-1000=-900\)

a) -7624 + ( 1543+7624 ) =1543

b) (27-514)- (486-73 ) = -900

Nếu đúng thì các bạn k cho mình nhé :):):):):):):):):)::)):):)::))):))):

a) -7624+(1543+7624)

= -7624+1543+7624

=(-7624+7624)+1543

=           0        +1543=1543

b) (27-514) - (  486 - 73)

= ( 27 - 514 ) + ( -486 - 73 )

=  27 - 514  + 486 + 73 

= 27 + 73 + 514 - 486

=      100   +        28=128

manh

a/ - 7624 + (1543+7624) =7624 + 9167 = 16791

b/ ( 27 - 514 ) - ( 486 - 73 ) = 489 - 413 = 76