12.2+12.5

=12.(2+5)

=12.7

=84

12.2+12.5=12.(2+5)=12.7=84 tick nha

12.2 + 12. 5    = 12 . ( 2 + 5 )

                      = 12 . 10

                       = 120

\(=\dfrac{3^9}{3^{12}}\cdot\dfrac{2^8}{2^6}=\dfrac{1}{27}\cdot4=\dfrac{4}{27}\)

\(\dfrac{3^9.2^8}{3^{12}.2^6}=\dfrac{3^9.2^6.2^2}{3^9.3^3.2^6}=\dfrac{2^2}{3^3}=\dfrac{4}{27}\)

12.2= 24

kb nha

:D

12.2=24

đúng ko

đúng k nhé

24

kb nha hot girl

a,   (20.2^4+12.2^4-48.2^2):8^2

     =(20.2^4+12.2^4-12.2^2.2^2):8^2

     =(20.2^4+12.2^4-12.2^4):2^6

     =2^4.(20+12-12):2^6

     =2^4.20:2^6

     =2^4.2^2.5:2^6

     =5

b,

=5^4.(75+175):15625

=5^4.250:15625

=156250:15625

=10

c, Thì chắc bạn chép sai đề bài rồi,đề bài của mình thế này cơ:

16 x 64 x 8² : ( 4³ x 2⁵ x 16 )

=2^4.2^6.2^6:(2^6.2^5.2^4)

=2^18:2^5

=2^13

 K MÌNH NHA

a. \(\left(20.2^4+12.2^4-48.2^2\right):8^2\)

= \(\left[2^4.\left(20+12\right)-48.4\right]:64\)

= \(\left[16.32-192\right]:64\)

= \(\left[512-192\right]:64\)

= \(320:64\)

= \(5\)

b. \(\left(75.5^2+175.54\right):\left(20.125-625.75\right)\)

= \(\left(75.25+175.54\right):\left(20.125-625.75\right)\)

= \(\left(1875+9450\right):\left(2500-46875\right)\)

= \(11325:\left(-44375\right)\)

= \(\dfrac{-453}{1775}\)

c. \(\left[6.64.8^2:\left(4^3-2^5.16\right)\right]\)

= \(\left[6.64.64:\left(64-32.16\right)\right]\)

= \(\left[24576:\left(64-512\right)\right]\)

= \(\left[24576:\left(-448\right)\right]\)

= \(\dfrac{-387}{7}\)

24 

tik nha ☺

=24

các bn cho mk vài li-ke cho tròn 890 với 

24 

tick mình nha 

\(a,25-(-18)+(-43)\)

=\(25+18+(-43)\)

=\(43+(-43)\)

=\(0\)

\(b,(-34)+11+\left|-34\right|+105\)

=\((-34)+11+34+105\)

=\([(-34)+34]+11+105\)

=\(0+11+105\)

=\(116\)

\(c,64+105+147-47.125\)

=\(64+125+(147-47).125\)

=\(64+125+100.125\)

=\(64+125+12500\)

=\(189+12500\)

=\(12689\)

\(d,360\div12.2+[(11-4)^3-343].2020\)

=\(360\div12.2+(7^3-343).2020\)

=\(360\div12.2+0.2020\)

=\(30.2+0\)

=\(60\)