nhanh giúp mik nhea

48

48

a: (-17)+5+8+17

\(=\left(-17+17\right)+\left(5+8\right)\)

=0+13

=13

b: \(\left(-24\right)+6+10+24\)

\(=\left(-24+24\right)+\left(6+10\right)\)

=0+16

=16

c: \(\left(-24\right)+6+\left(-10\right)+24\)

\(=\left(-24+24\right)+\left(6-10\right)\)

=0+(-4)

=-4

d: \(\left(-456\right)+2021-544\)

\(=2021-\left(456+544\right)\)

=2021-1000

=1021

e: \(\left(-1075\right)-29-\left(-1075\right)\)

\(=-1075+1075-29\)

=0-29

=-29

f: \(\left(-135\right)+48+140-\left(-5\right)\)

\(=48+\left(-135+140+5\right)\)

=48+10

=58

g: \(329+64+\left(-394\right)+36\)

\(=\left(329-394\right)+\left(64+36\right)\)

=100-65

=35

h: \(\left(-427\right)+\left(-123\right)+23+27\)

\(=\left(-427+27\right)+\left(-123+23\right)\)

=-400-100

=-500

bai 1 tim tong cua tat ca cac so nguyen x thoa man

a)-5<x<8 

 x = -4; -3; -2; -1; 0; 1; 2; 3; 4;5 ;6 ;7

b)-<x<12 ??? Câu b thiếu nha bn

c)-287+499+(-499)+285

= (-499+499)+ ( -287+285)

= -2

d)(-135)+48+140+(-5)

= [(-135)+(-5) + 140] +48

= 48 

a)\(x\in\left\{-4;-3;-2;-1;0;1;2;3;4;5;6;7\right\}\)

c)=-287+285=-2

d)=(-87)+135=48

b=-12<x<12

a) 13.(23+22)-3.(17+28)

= 13.45 - 3.45

= 45(13-3)

= 45.10 =450

b) -48+48.(-78)+48(-21)

= -48 + 48(-78 - 21)

= -48 + 48.(-99)

= -48 + ( -4752)

= -4800

c) 135.(171-123)-171.(135-123)

= 135.171 - 135.123 - 171.135 + 171.123

= (135.171 - 171.135) - (135.123 - 171.123)

= - 123(135 - 171) = (-123).(-36)= 4428

d: =(1-2)+(3-4)+...+(99-100)

=(-1)+(-1)+...+(-1)

=-50

j: SỬa đề: -1+3-5+7-...-97+99

=(-1+3)+(-5+7)+...+(-97+99)

=2+2+...+2

=2*50=100

e: Sửa đề: 2-4+6-8+...+46-48+50

=(2-4)+(6-8)+...+(46-48)+50

=50-2*24=50-48=2

Đáp án:

135 - 48 + 5 = 87 + 5 = 92

135 - 48 + 5 = 87 + 5 = 92

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Trả lời:

\(\frac{-135}{140}\)\(=-\frac{27}{28}\)

Hok tốt !

^_^

135/140 =  135:5/140:5 = 27/28

Trả lời :

\(\frac{-135}{140}=\frac{27}{28}\)

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