\(A=\frac{2^{10}.13+2^{10}.65}{2^8.104}\)

\(A=\frac{2^8.2.78}{2^8.104}\)

\(A=\frac{2}{13}\)

\(\)

A, 2^10x13+2^10x65/2⁸x104

=2^10x(13+65)/2⁸x4x26

=2¹⁰x78/2⁸x2²x26

=2¹⁰x78/2¹⁰x26

=78/26

=3

b, (1+2+3+...+100)x(1²+2²+3²+...+10²)x(65x111-13.15.37)

=(1+2+3+...+100)x(1²+2²+..+10²)x(7215-7215)

=(1+2+..+100)x(1²+2²+..+10²)x0

=0

Thank you very much!!!

(2¹⁰.13 + 2¹⁰.65) : (2⁸.3.13)
= [2¹⁰.(13 + 65)] : (256.3.13)
= [2¹⁰.78] : (768.13)
= [1024.78] : 9984
= 79872 : 9984
= 8

= 8 

Quá nhanh gọn rồi bạn ơi 

cách làm??

ai có thể chỉ giúp tôi được ko vì tôi cần rất gấp

\(a,\dfrac{-5}{13}+\dfrac{8}{13}=\dfrac{3}{13}\\ b,\dfrac{5}{31}+\dfrac{-22}{31}=\dfrac{-17}{31}\\ c,\dfrac{-13}{43}+\dfrac{-40}{43}=\dfrac{-53}{43}\\ d,\dfrac{-3}{29}-\dfrac{16}{58}=\dfrac{-11}{29}\\ e,\dfrac{8}{40}-\dfrac{-36}{45}=1\\ f,\dfrac{-8}{18}-\dfrac{-15}{27}=\dfrac{1}{9}\\ g,\left(-2\right)+\dfrac{-5}{8}=\dfrac{-21}{8}\)

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

B)( -18).(55-24)-28.(44-68)=-18.31-28.(-24)=-588+672=84

C) (135+35).(-37)+37.(-42-58)=170.(-37)+37.(-100)=37.[-170+(-100)]=37.(-270)=-9990

D) -65.(87-17)-87.(71-65)=-65.60-87.6=-3900-522=-4422

E)  [ 3.( -2)-(-8) ]  .  (-7).(-2).(-5)=2.(-7).(-2).(-5)=-14.(-2).(-5)=28.(-2)=-56

H) ( -25)+8+12+25=(-25+25)+(8+12)=0+20=20 

K)  40 + 15 + (-10) + (-15)=(-15+15)+(-10+40)=0+30=30

F)  -13+(-750)+(-17)+ 750=[-13+(-17)]+(-750+750)=-30+0=-30

J)   ( -7) + ( -20  ) +35 + (-8)=-27+35+(-8)=8+(-8)=0

a)13-2(x+1)=7

  2.(x+1)=13-7

  2.(x+1)=6

  x+1=6/2

  x+1=3 

  x=3-1

  x=2

a, 13 - 2 ( x + 1 ) = 7

          2 .( x + 1 ) = 13 - 7
          2 .( x + 1 ) = 6
                x + 1   = 6 : 2
                x + 1    = 3
                x          = 3 - 1
                x           = 4