y - 27/54 - 1212/3636 = 1/6

y - 1/2 - 1/3 = 1/6

y = 1/6 + 1/2 + 1/3

y = 1

\(A=\frac{121212}{363636}+\frac{1212}{3636}\)

\(=\frac{1}{3}+\frac{1}{3}=\frac{2}{3}\)

#)Giải :

\(\frac{121212}{363636}=\frac{121212:10101}{363636:10101}=\frac{12}{36}=\frac{1}{3}\)

\(\frac{1212}{3636}=\frac{1212:101}{3636:101}=\frac{12}{36}=\frac{1}{3}\)

\(\Rightarrow A=\frac{1}{3}+\frac{1}{3}=\frac{2}{3}\)

= 0 ( dư 1212 ) nha

36/108=1/3

75/105=5/7

1212/3636=1/3

75/100=3/4

k cho minh nhe

\(\frac{121212+12121212-1212}{363636-36363636-3636}=\frac{12\left(111111+11111111-1111\right)}{36\left(111111+11111111-1111\right)}=\frac{12}{36}=\frac{1}{3}\)

1/3 nha

\(\frac{1}{3}\)

chúc ban hk tốt!!(k cho tui nhé)

1 tính nhanh: a/ [ 2727/ 3636 + 1212/5454 ] x 9/10 = (3/4 + 2/9) x 9/10

                                                                                 = 3/4 x 9/10 + 2/9 x 9/10

                                                                                 = 27/40 + 1/5

                                                                                 = 27/40 +  8/40

                                                                                 = 7/8

\(\frac{121212+12121212-1212}{363636+36363636-3636}\)

\(=\frac{12.10101+12.1010101-12.101}{36.10101+36.1010101-36.101}\)

\(=\frac{12\left(10101+1010101-101\right)}{36\left(10101+1010101-101\right)}\)

\(=\frac{12}{12.3}\)

\(=\frac{1}{3}\)

Ta có: \(\frac{121212+12121212-1212}{363636+36363636-3636}\)

           =\(\frac{12\times\left(10101+1010101-101\right)}{36\times\left(10101+1010101-101\right)}\)

           =\(\frac{12}{36}\)

           =\(\frac{1}{3}\)

\(\frac{121212+12121212-1212}{363636+36363636-3636}\)

\(=\frac{121212+12121212-1212}{3\times121212+3\times12121212-3\times1212}\)

\(=\frac{121212+12121212-1212}{3\times\left(121212+12121212-1212\right)}\)

\(=\frac{1}{3}\)

_Chúc bạn học tốt_

a) 7.3x8.3+3.8x7.3-5x7.3x0.4

=7.3x(8.3+3.8-5x0.4)

=7.3x10.1

=73.73

b)\(\frac{1}{10}:0.1-\frac{1}{8}:0.125+\frac{1}{2}:0.5-\frac{1}{4}:0.25\)

=1-1+1-1=0

c)\(\left(\frac{2727}{3636}+\frac{1212}{5454}\right)\times\left(\frac{9}{70}\right)=\left(\frac{3}{4}+\frac{2}{9}\right)\times\left(\frac{9}{70}\right)\)

=\(\frac{35}{36}\times\frac{9}{70}\)=\(\frac{1}{8}\)

d) 120x999+\(\frac{120}{5\times2.5\times125\times4\times0.8}\)

=120x999+\(\frac{120}{5000}\)

=120x999+\(\frac{3}{125}\)

=119880.024

a 73,73

b1/8

c 119880,024

đúng nha 

k mình nha mn

sai câu d thì phải

a 3.x-2.x=84-24

x=60

b 12x-91=3636:36

12x-91=101

12x=101+91

12x=192

x=192:12=16

a. = 60

b. = 16

3x + 24 = 2x + 84

=> x     = 84 - 24 

      x    = 60

3636 : ( 12x - 91 ) = 36

             12x - 91   = 101

              12x         = 101 + 91

               12x         = 192

                   x         = 16