a,(38-129+43)-(43+38)=38-129+43-43-38=(38-38)+(43-43)-129=-129

b,-144-[29-(+144)-(-144)=-144-29+144-144=(144-144)-29-144=-173

c)48+|48-174|+(-74)=18+126-74=70

d)(-123+77)-(277-23-123)=-123+77-277+23+123=(-123+123)+(77-277)+23=-200+23=-177

e)-(-57-159)+(43-169)=57+129+43-169=(57+43)+(129-169)=100-40=60

Chúc bạn học tốt( sai chỗ nào cho mjk sr nka??) k cho  mjk nka

Ta có : (-123) + 77 + (-257) + 23 - 43

= (-123 + 23) + (77 - 257) - 43

= -100 + 180 - 43

= 80 - 43 

= 37 

\(\left(-123\right)+77+\left(-257\right)+23-43\)

\(=\left(-123\right)+23+\left(-257\right)+77-43\)

\(=\left(-100\right)+\left(-180\right)-43\)

\(=\left(-280\right)-43=-323\)

(-123)+77+(-257)+23-43

=(-123+23)+(77-257)-43

=-100+180-43

=80-43

=37

1 câu hay 2 câu vậy bn

   \(3^{^{ }2}\) . 5 + 2³.10  - 81: 3

= 9.5 + 8.10 - 27

= 45 + 80 - 27

= 125 - 27

= 98 

\(3^2\cdot5+2^3\cdot10-81:3\)

\(=9\cdot5+8\cdot10-3^4:3\)

\(=40+80-3^3\)

\(=120-27\)

\(=93\)

\(3^2.5+2^3.10-81:3\\=9.5+8.10-3^4 :3\\ =40+80-3^3\\ =120-27\\ =93\)

Đúng cho like nhé

(\(\frac{121}{122}\). \(\frac{123}{125}\)) .(\(\frac{1995}{1996}\).\(\frac{17}{16}\)- \(\frac{21}{25}\):\(\frac{16}{17}\)).(\(\frac{42}{30}\).\(\frac{75}{23}\)-\(\frac{19}{23}\).\(\frac{210}{38}\))

= (121/122 . 123/125) . ( 1995/1996 . 17/16 - 21/25 : 16/ 17) . 0

= 0

-23.63+23.21-58.23

=23.(-63)+23.21-58.23

=23.(21-63-58)

=23.(-100)

=-2300

a)  − 105 + − 25 + ( − 105 ) + 50  

= 105 + 25 + ( - 105) + 50

= [105 + ( -105)] + ( 25 + 50 )

= 0 + 75 = 75

b)  465 + − 38 + − 465 − 12 − − 42

= 465 + ( - 38) + ( -465) – 12 – 42

= [ 465 + (- 465) ] – ( 12 + 42 )

= 0 – 54 = 0 + ( -54 ) = -54

c)  65. − 19 + − 19 .24 + − 19 .11

= ( - 19) . ( 65 + 24 + 11 )

= ( -19) . 100 = -1900

d)  − 3 2 + 2 3 − − 5 2 + 4 3

= 9 + 8 – 25 + 64 = 56

\(\left(-123\right)+77+\left(-257\right)+23-43=\left(-123+23\right)+\left(77-257\right)-43=-100-180-43=-323\)

(−123)+77+(−257)+23−43

=(−123+23)+(77−257)−43

=−100−180−43

=−323

Bài làm của mik nèe : ^_^

(−123)+77+(−257)+23−43

=(−123+23)+(77−257)−43

=−100−180−43

=−323

Kết quả là : - 323

Tick cho mik nha! :3

-23.63+23.21-58.23

=23(-63+21-58)

=23.(-100)

=-23000