13,54 x 36 + 64 x 13,54

= 13,54 x ( 36 + 64 )

= 13,54 x 100

=      1354

=13,54.(64+36)

=13,54.100]

=1354

13,54 x 36 + 64 x 13,54

=13,54 x ( 36 + 64 )

= 13,54 x 100

= 1354

k mik nhé

(77.56+42.63)-(2.63+27.56)

=(77.56-27.56)+(42.63-2.63)

=50+40

=90

(77,56 + 42,63) - (2,63 + 27,56)

= 120,19 - 30,19

= 90

(77,56+42,63)-(2,63+27,56)=(77,56-27,56)+(42,63-2,63)

                                            =50+40

                                            =90

  (x+2)+(x+4)+(x+6)+...+(x+100)=5100

=> \(\frac{\left(x+x+x+...+x\right)}{50csx}\) +(2+4+6+...+100)=5100=>50x+2550=5100=>50x=2550=>x=51

(x + 2) + (x + 4) + (x + 6) + ... + (x + 100) = 5100

(x + 2.1) + (x + 2.2) + (x + 2.3) + ... + (x + 2.50) = 5100

(x + x + x + ... + x) + (2.1 + 2.2 + 2.3 + ... + 2.50) = 5100

     50 số x

50.x + 2.(1 + 2 + 3 + ... + 50) = 5100

50.x + 2.(1 + 50).50:2 = 5100

50.x + 51.50 = 5100

50.(x + 51) = 5100

x + 51 = 5100 : 50

x + 51 = 102

x = 102 : 2

x = 51

Dấu . tức là nhân nha

Vậy x = 51

b: =(4,5+5,4)x0,01

=9,9x0,01

=0,099

\(=\dfrac{45\cdot100\cdot0.25}{35\cdot100\cdot36}=\dfrac{45}{36}\cdot\dfrac{0.25}{35}=\dfrac{5}{4}\cdot\dfrac{1}{140}=\dfrac{1}{28\cdot4}=\dfrac{1}{112}\)

1/112

mn giải rõ giúp mik nha

   11,5 x 0,01 + 55,2 : 100 + 1/100 x 33,3

=     0,115      +    0,552     +    0,333

=                             1

mong bạn tick cho mik

11,5 x 0,01 + 55,2 : 100 + 1/100 x 33,3

=11,5 x 0,01 + 55,2 x 0,01 + 0,01 x 33,3

=0,01 x ( 11,5 + 55,2 + 33,3 )

= 0,01 x 100

= 1

3/5

(8/9+3/27)x3/5

= 1 x 3/5

= 3/5

(8/9 + 3/27) x 3/5

= 1 x 3/5

= 3/5