\(2\times4\times6\times8=8\times48=384\)

tick cho mình với nha

mình cũng sẽ tick các bạn

2x4x6x8        2x4+25x6       28x12x25

= 8x6x8        = 8+150         =336 x25

=48x8           =158             = 8.400

=384

4x3x4x2       5x15+5x85       54x18x30

=12x4x2      =75 + 425        =972x30

=84x2          = 500               = 29160

=96

=>5/6-y=1/2

hay y=1/3

X+X/5 x 15/2+X/2.9=315

=>X+3X/2+9X/2=315

=>X+12X/2=315

=>X+6X=315=>7X=315=>X=45

càm ơn 

x ở trên là dấu nhân

tính giá trị biểu thức

\(\dfrac{8^5\cdot15^4}{2^{15}\cdot3^4\cdot5^3}=\dfrac{2^{15}\cdot3^4\cdot5^4}{2^{15}\cdot3^4\cdot5^3}=5\)

\(\dfrac{8^5.15^4}{2^{15}.3^4.5^3}=\dfrac{\left(2^3\right)^5.3^4.5^4}{2^{15}.3^4.5^3}=\dfrac{2^{15}.3^4.5^4}{2^{15}.3^4.5^3}=5\)

a ) 7500 : 3 x 12 = 2500 x 12 = 30000

b ) 85000 : 5 x 15 = 17000 x 15 = 255000

a ) 7500 : 3 x 12

= 2500 X 12

= 30000

b) 85000 : 5 x 15

= 17000 x 15

= 255000

7500:3x12=2500x12=30000

85000:5x15=17000x15=255000

a, \(x\) - \(\dfrac{2}{7}\) = \(\dfrac{4}{5}\) \(\times\) \(\dfrac{15}{24}\)

    \(x\) - \(\dfrac{2}{7}\) = \(\dfrac{1}{2}\)

    \(x\)        = \(\dfrac{1}{2}\) + \(\dfrac{2}{7}\)

    \(x\)       = \(\dfrac{11}{14}\)

b, \(x\): \(\dfrac{2}{7}\) = \(\dfrac{9}{8}\) - \(\dfrac{15}{6}\)

     \(x\):  \(\dfrac{2}{7}\) = - \(\dfrac{11}{8}\)

     \(x\)      = - \(\dfrac{11}{8}\) \(\times\) \(\dfrac{2}{7}\)

     \(x\)     = - \(\dfrac{11}{28}\)

a) x = 11/14

b) x = -11/28

\(a,\) \(x\) \(-\) \(\dfrac{2}{7}\) \(=\dfrac{4}{5}\times\dfrac{15}{24}\)

   \(x-\dfrac{2}{7}=\dfrac{1}{2}\)

  \(x\)          \(=\) \(\dfrac{1}{2}+\dfrac{2}{7}\)

 \(x\)           \(=\) \(\dfrac{11}{14}\)

\(b,\) \(x\div\dfrac{2}{7}=\dfrac{9}{8}-\dfrac{15}{6}\)                                               

\(x\div\dfrac{2}{7}=\dfrac{87}{24}\)

\(x=\dfrac{87}{24}\times\dfrac{2}{7}\)

\(x=\dfrac{87}{84}\)

y-2/7=4/5x15/24

y-2/7=4/5x5/8

y-2/7=1/2

y=1/2+2/7

y=7/14+4/14

y=11/14

75/45 = 5/3 nha

(37-17).(-5)+23.(-13-17)