\(A=\left(-2\right)+\left(-2\right)+\left(-2\right)+\left(-2\right)=-8\)

\(B=\left(455-311-144\right)+789=789\)

\(C=183-150+120-183-150-20=120-20=100\)

A=-8

B=789

C=100

 (-183)x(26-17)-17x(183+26)

=-183x26-(-183x17)-17x183+17x26

=-183x26+17x26+(-183x17)-17x183

=26x(183+17)+0

=26x200

=5200

Kết quả mình làm thì ra -5200 bạn à.

(-183).(26-17)-17.(183+26)

=(-183).26-(-183).17-(17.183+17.26)

=(-183).26-(-183).17-17.183-17.26

=(-183).26+(183.17-17.183)-17.26

=-183.26+0-17.26

=(-183+17).26

=-200.26

=-100.52

=-5200

1)

a) -(2+5) = -2 - 5 = -7

b) +(-3+6) = -3 + 6 = 3

c) (-50+3) = -50 + 3 = -47

d) -(-2+3) = 2 - 3 = -1

e) -(10-3) = -10 + 3 = -7

f) -(-3)-(-3+1) = 3 + 3 - 1 = 5

g) (-5)+(-2+10) = -5 - 2 + 10 = 3

2)

a) -50+120+(-150)-20+30

= -(50 + 20) + (120 + 30 - 150)

= -70

b) 265-70+(-65)-30+15

= (265 - 65) - (70 + 30) + 15

= 200 - 100 + 15 = 115

c) -17+185-183+(-85)-63

= (185 - 85) - (183 + 17) - 63

= 100 - 200 - 63 = -163

d) -30+60+(-170)-260+19

= -(170 + 30) - (260 - 60) + 19

= -200 - 200 + 19 = -381

a) \(17+188+183=205+183=388\)

b) \(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-\left(130-64\right)\)

\(80-66=14\)

c) \(2^3.17-2^3.14\)

\(8.17-8.14\)

\(=8.\left(17-14\right)\)

\(=8.3=24\)

a) 17.(-183)+17.83

= 17.(-183+83)

= 17.100=1700

 b) (-27).145+27.45

= 27.(-145)+27.45

= 27.(-145+45)

= 27.100=2700

 c) -38.(25-4)+25.(-4+38)

= -38.25-(-38).4+25.(-4)+25.38

= -38.25+25.38+38.4+25.(-4)

= 0+38.4+(-25).4

= 4.(-25+38)

= 4.13=52

 d) 23.(145-17)-145.(23-37)

= (23.145-23.17)-(145.23+145.37)

= [23.(145-17)]-[145.(23+37)]

= (23.128)-(145.60)

= 2944-8700=-5756

17/98;27/148;37/183;47/223 

\(\dfrac{17}{98}< \dfrac{27}{148}< \dfrac{37}{183}< \dfrac{47}{223}\)

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Minh nghi la 17/98;27/148;37/183;47/223