\(27.\left(234+65\right)+73.\left(234+65\right)\)

\(=\left(27+73\right).\left(234+65\right)\)

\(=100.299\)

\(=29900\)

\(\frac{2424}{12}+\frac{3636}{12}=\frac{2424+3636}{12}=\frac{6060}{12}=505\)

27 . (234+65) + 73 . (234+65) = (27+73) . (234+65) = 100. 299 = 29900

2424/12 + 3636/12 = (2424+3636)/12=6060/12=505

234-[(-45)+234]+65

=234+45-234+65

=(234-234)+(45+65)

=0+110=110

a, 234 - [ ( - 45 )  - ( 234)  + 65 ] 

= 234 - [ -280+65]

=234 - (-215)

= 449

b, - 25 . 21 + 25 . 72 + 49 . 25

=-25 x 72 + 25 .21 - 49 x 25

=25 x -72 + 25 . 21 - 49 . 25

=25 x (-72 + 21 - 49)

=25 x -100

=-2500

27.(15-12)-15.(27-12)

= 27.15 - 27.12 - 15.27 - 15.12

= (27.15-15.27) - 12.(27-12)

= 0 - 12.15

= 180

3678 - 65 + 234 = 3847

537 + 537 = 537 x 2 = 1074

12 376 - 754 = 11 622

Chúc bạn học tốt, nhớ k mình nha

3678 - 65 + 234 = 3847

537 + 537 = 1074

12376 - 754 = 11622

nhớ k cho t nhá

cảm ơn

a) 5x = 120 : 2

5x = 60

x = 60 : 5

x = 12

b) 3x + 27 = 45

3x = 45 - 27

3x = 18

x = 18 : 3

x = 6

c) 73 + x - 122 = 234 : 2

73 + x - 122 = 117

73 + x = 117 + 122

73 + x = 239

x = 239 - 73

x = 166

d) 32 - 2(x - 1) = 12

2(x - 1) = 32 - 12

2(x - 1) = 20

x - 1 = 20 : 2

x - 1 = 10

x = 10 + 1

x = 11

e) 3(x + 1) - 15 = 36

3(x + 1) = 36 + 15

3(x + 1) = 51

x + 1 = 51 : 3

x + 1 = 17

x = 17 - 1

x = 16

f) 21 - (4x - 16) = 21

4x - 16 = 21 - 21

4x - 16 = 0

4x = 0 + 16

4x = 16

x = 16 : 4

x = 4

g) 13x - 3x = 500

10x = 500

x = 500 : 10

x = 50

h) 9x + x - 35 = 65

10x - 35 = 65

10x = 65 + 35

10x = 100

x = 100 : 10

x = 10

x - 28 = 74 

x = 74 + 28 

x =     102

   x + 65 = 234

   x = 234 - 65

   x =     169

x - 28 = 74

x       = 74 + 28

x        = 102

x+ 65 = 234

x        = 234 - 65

x        = 169

x-28=74

x=74+28

x=102

x+65=234

x=234-65

x=169

3,527 + 65 x 73 + 65 x 27 + 3,573

= 3,527 + 65 x ( 73 + 27 ) + 3,573

= 3,527 + 65 x 100 + 3,573

= 3,527 + 6500 + 3,573

= 6507,1

\(3,527+65\times73+65\times27+3,573\\ =\left(3,527+3,573\right)+65\times\left(73+27\right)\\ =7,1+65\times100\\ =7,1+6500\\ =6507,1\)

A =3,527 + 65 \(\times\) 73 + 65 \(\times\) 27 + 3,573

A = (3,527 + 3,573) + (65 \(\times\) 73 + 65 \(\times\) 27)

A = 7,1 + 65 \(\times\) ( 73 + 27)

A = 7,1 + 65 \(\times\) 100

A = 7,1 + 6500

A = 6507,1