a) 5 + (-5) = 0

b) 71-52 = 19

c) 28 + (-82) = -64

d) 47 + (-30) = 17

e) (-41) + (-59) = -100

f) 75 + (-10) = 65

t) 26 - 43 = -17

y) 90 - 25 = 650

o) 72 + (-9) = 63

p) (-3) + 3 = 0

=-516

chúc bn hok giỏi

Băng -516 đó bạn

a) $420-(71+420)$

$=420-71-420$

$=-71$

b) $(35-120)+(120+410-35)$

$=35-120+120+410-35$

$=(35-35)+(-120+120)+410$

$=410$

c) $(320-15+49)-(85-51)$

$=320-15+49-85+51$

$=320+(-15-85)+(49+51)$

$=320+(-100)+100$

$=320$

d) $-(312+59)-(41+400+88)$

$=-312-59-41-400-88$

$=(-312-88)+(-59-41)-400$

$=-400+(-100)-400$

$=-500-400$

$=-900$

e) $(430-731)-(-731+430-56)$

$=430-731+731-430+56$

$=(430-430)+(-731+731)+56$

$=56$

f) $(1352-47)-(53-1000+1352)$

$=1352-47-53+1000-1352$

$=(1352-1352)+(-47-53)+1000$

$=(-100)+1000$

$=1000-100$

$=900$

h) $(-42)-(370+58)-(120-370)$

$=-42-370-58-120+370$

$=(-42-58)+(-370+370)-120$

$=-100-120$

$=-220$

$Toru$

Chịu

vì bài dài nên mk chỉ ghi kết quả thui nha

a,0

b,19

c,-54

d,17

e,-100

f,65

t,17

y,65

o,63

p,0

3,

a,-10

b,-100

1 Tính :

a)5+(-5)=0

b)71-25=46

c)28+(-82)=-54

d)47+(-30)=17

e)(-41)+(-59)=-100

f)75+(-10)=65

t)26-43=-17

y)90-25=65

o)72+(-9)=63

p)(-3)+3=0

2 Tính nhanh :

a)(-150)-47+150-53

=(-150+150)-47-53

=-100

b)250+(-90)-250-10+100

=(250-250)+(-90)-10+100

=0

c)71+92-28-(-29)+8-72

=71+92-28+29+8-72

=(71+29)+(92+8)-(28+72)

=100+100-100

=100

d)45+(-31)-45+(-31)

=(45-45)+(-31+-31)

=-62

3 Tìm x biết :

a)x-5=-15

 x=-15+5

 x=-10

b)21+x=-79

 x=-79-21

 x=-100

c)x-15=-23+(-6)

 x-15=-29

 x=-29+15

 x=-14

d)200-x=/-32/-41

 200-x=32-41

 200-x=-9

 -x=-9-200

 -x=-209

=>x=209

ko hieu

=12-12

=0

ai giải giùm mik đi gần nộp bài rồi huhu :(((

1) Tính

a, 5 + (-5) = 0

b, 71 - 52 = 19

c, 28 + - (82) = -54

d, 45 + (-31) - 45 + (-30) = 45 + (-31) + (-45) + (-30) = [45 + (-45)] + [(-31) + (30)]

= 0 + (-1) = -1

2)Tìm x

a, x - 5 = -15

x = (-15) + 5

x = -10

b, 21 + x = -79

x = (-79) - 21

x = -100

c, x - 15 = -23 + (-6)

x - 15 = -29

x = -29 + 15

x = -14

d, 200 - x = /-32/ - 41

200 - x = 32 - 41

200 - x = -9

x = 200 - (-9)

x = 209

1. \(=\left(-23+27-13+47-23+37-13+47\right):45\)\(=\left(-23.2-13.2+27.2+47.2\right):45=\left(-72+148\right):45=\frac{76}{45}\)
2. \(=59:\left(111-522+115-23\right)=59:\left(-319\right)\)

[ 71- (-59)] - [ (-83)- (95)]

=130-(-179)

=308

ngta bảo tính nhanh chứ không phải tính chậm mẹ

a: \(\left(36-16\right)\cdot\left(-15\right)+16\cdot\left(-14-6\right)\)

\(=-15\cdot20+16\cdot\left(-20\right)=-20\cdot\left(-15+16\right)=-20\)

b: \(\left(-47\right)\cdot\left(-69\right)-\left(-31\right)\cdot47\)

\(=47\cdot69+31\cdot47\)

\(=47\cdot100=4700\)

c: \(38\cdot\left(-41\right)+59\cdot\left(-38\right)\)

\(=38\left(-41-59\right)\)

\(=-100\cdot38=-3800\)