a)2575 + 37 + 2576 -29

= ( 2575 - 2576 ) + ( 37 - 29)

= -1+ 8

= 8-1

= 7

a, \(2575+37-2576-29\)

\(=\left(2575-2576\right)+\left(37-29\right)\)

\(=\left(-1\right)+8=7\)

P/s: Cấm k :>

a, 2075-(-37+2076+47)

= 2075 + 37 - 2076 - 47

= - (2076-2075) - (47-37)

= -1 - 10

= -11

b, 34 + 35 + 36 + 37 - 14 - 15 - 16 - 17

= (34-14) + (35-15) + (36-16) + (37-17)

= 20 + 20 + 20 + 20

= 20.4

= 80

c, (27-514)-(486-73)

= 27 - 514 - 486 + 73

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

= 100 - 1000

= -900

106.
\(9-25=\left(7-x\right)-\left(25+7\right)\)
\(-16=\left(7-x\right)-32\)
\(\left(7-x\right)-32=-16\)
\(7-x=-16+32\)
\(7-x=16\)
\(-x=16-7\)
\(-x=9\)
\(x=-9\)
\(\text{Vậy }x=-9\)

107. a) 2575 + 37 – 2576 – 29 = ( 2575 – 2576 ) + ( 37 – 29 ) = -1 + 8 = 7

b) 34 + 35 + 36 + 37 – 14 – 15 – 16 – 17

= ( 34 – 14 ) + ( 35 – 15 ) + ( 36 – 16 ) + ( 37 – 17 )

= 20 + 20 + 20 + 20 = 80
108.

a) – 7624 + ( 1543 + 7624 )
= -7624 + 1543 + 7624
= (-7624 + 7624)+1543
= 0 + 1543
= 1543

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

108: Tính nhanh:

a)-7624+(1543+7624)

=-7624+1543+7624

=(-7624+7624)+1543

=0+1543=1543

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

=27-514-486+73

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

=100-1000=-900

-7624 + ( 1543 + 7624 )

= -7624 + 1543 + 7624

= ( -7624 + 7624 ) + 1543

= 0 + 1543

= 1543

( 27 - 514 ) - ( 486 - 73 )

= 27 - 514 - 486 + 73

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

= 100 - 1000

= -900

-7624 + ( 1543 + 7624 )

= ( -7624 + 7624 ) + 1543

= 0 + 1543

= 1543

( 27 - 514 ) - ( 486 - 73 )

= ( -487 ) - 413

= -900

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

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

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