A.(26-6).(-4)+31.(-7-13)=20.(-4)+31.(-20)=(-20).4+31.(-20)=(-20).(31+4)=(-20).35=-700

B.(-13).34-87.34=34.[(-13)-87]=34.(-100)=-3400

C.(-127).57+(-127).43=(-127).(57+43)=(-127).100=-12700

D(37-17).(-5+24.(13-17)=20.(-5+24.(-4)=20.(-5+(-96)=20.(-101)=-2020

Bạn viết rõ dấu sao thành dấu nhân đi, khó nhìn

kệ nó !!!! giúp mk với !!!! please

a, (38 - 29 + 43) - (43 + 38)
= 38 - 29 + 43 - 43 - 38
= (38 - 38) + (43 - 43) - 29
= -29
b, 271 - [(-43) + 271 - (-17)]
= 271 - (-43 + 271 + 17)
= 271 + 43 - 271 - 17
= (271 - 271) + (43 - 17)
= 26
@Dương Taurus

c, (-11)².3 - [3 - (-50).(-4)]
= 121.3 - [(3 + 50.(-4)]
= 363 - 3 + 200
= 560
d, 4.5² + 81.3² - (13 - 4)²
= 4.25 + 81.9 - 13² + 4²
= 100 + 729 - 169 + 16
= 676
@Dương Taurus

a)10-(-12)+9+1

=10-10-(-12)

=0-12

=-12

a) 10-(12-(-9-1))

= 10 - ( 12 + 9+1)

=10-12-9-1

=-12

b) ( 39-29+43) - (43+38)

= 39-29+43-43-38

= 39-38+(43-43)-29

=1+0-29

= -28

a) `537 + (56 + 216) - (216 + 437)=537+56+216-216-437=(537-437)+(216-216)+56=100+0+56=156`
b) `271 - (- 43) + 271 + (- 17)=271+43+271-17=568`
c) `26 . (- 125) - 125 (- 36)= (-26) .125- 125 (- 36)=125[(-26)-(-36)]=125.10=1250`

a: \(\left(24-234\right)+\left(234-24-77\right)\)

\(=24-234+234-24-77\)

\(=\left(24-24\right)+\left(234-234\right)-77\)

=0+0-77

=-77

b: \(\left(13-135+49\right)-\left(13+49\right)\)

\(=13-135+49-13-49\)

\(=\left(13-13\right)+\left(49-49\right)-135\)

=0+0-135

=-135

c: \(159-524-\left(59-424\right)\)

\(=159-524-59+424\)

\(=\left(159-59\right)-\left(524-424\right)\)

=100-100

=0

d: \(\left(36+79\right)+\left(145-79-36\right)\)

\(=36+79+145-79-36\)

\(=\left(36-36\right)+\left(79-79\right)+145\)

=0+0+145

=145

e: \(334-\left(117+234\right)+\left(42+117\right)\)

\(=334-117-234+42+117\)

\(=\left(334-234\right)+\left(117-117\right)+42\)

=100+0+42

=142

f: \(271-\left[\left(-43\right)+271-\left(-17\right)\right]\)

\(=271+43-271+\left(-17\right)\)

\(=\left(271-271\right)+\left(43-17\right)\)

=0+26

=26

-700

-3400

-12700

-820 

Tích cho mk nha

a )   159 − 524 − 59 − 424 ; = 159 − 524 − 59 + 424 = 159 − 59 − 524 − 424 = 100 − 100 = 0 b )   36 + 79 + 145 − 79 − 36 ; = 36 + 79 + 145 − 79 − 36 = 36 − 36 + 79 − 79 + 145 = 145 c )   334 − 117 + 234 + 42 + 117 ; = 334 − 117 − 234 + 42 + 117 = 334 − 234 − 117 − 117 + 42 = 100 + 42 = 142 d )   271 − − 43 + 271 − − 17 . = 271 − − 43 + 271 + 17 = 271 + 43 − 271 − 17 = 271 − 271 + 43 − 17 = 26

ê sao dài thế chẳng ra đâu vào đâu cả

a)271+43-271-17=26

b)38-29+43-43-38=-29

c)-20-25+11+8+25-8+20=11

học tốt

   271-[(-43)+271-(-17)]

= 271 + 43 - 271 -17

= ( 271 - 271 ) + ( 43 - 17 )

=        0   +   26

=    26

-144-[29-(+144)-(+144)]

= - 144 - 29 + 144 + 144

= ( 144 - 144 ) + ( 144 - 29 )

=         0           +  115

= 115

a) Ta có: \(271-\left[\left(-43\right)+271-\left(-17\right)\right]\)

\(=271-\left(-43+271+17\right)\)

\(=271+43-271-17\)\(=43-17=26\)

b) Ta có: \(-144-\left[29-\left(+144\right)-\left(+144\right)\right]\)

\(=-144-\left[29-144-144\right]\)

\(=-144-29+144+144\)

\(=144-29=115\)

sai hết rồi phải bằng 115