( 125 - 37 ) * 48 + 52 * ( 26 + 62 )

= 88 . 48 + 52 . 88

= 88 (48 + 52)

= 88 . 100 

= 8800

\(\left(125-37\right).48+52.\left(25+62\right)\)

\(=88.48+52.88\)

\(=88\left(48+52\right)\)

\(=88.100\)

\(=8800\)

a) 125.3+125.125.6

=125.3+125.750

=125.(3+750)

=125.753

=94125

b) (245.99+245)-(145.101-145)

=(245.(99+1))-(145.(101-1))

=245.100-145.100

=(245-145).100

=100.100

=10000

c) 154.(28+52)-45.(26+54)

=154.80-45.80

=(154-45).80

=109.80

=8720

a) 125x3+125+125x6

=125x(3+1+6)

=125x10

=1250

b) (245x99+245)-(145x101-145)

=(245x99+245)-(145x100)

=(245x100)-14500

=24500-14500

10000

c) 154x80-45x80

=80x(145-45)

=80x100

=8000

123

duyệt đi

61000

-1400000

2600

Cách làm là...........bấm máy tính hjhj

1234 : 12 =  102.3333.. 

125 x 24 = 3000 

26 x 100 + 52 = .2652

hok tốt

1234:12=101[dư 2]

125x24=3000

26x100+52=2652

chúc hok tốt

a). 5^x = 125

=>5^x = 5³

=> x = 3

b) 3^2x = 81

=> 3^2x = 3⁴

=> 2x = 4

=> x = 2

c). 5^2x-3 – 2.5² = 5² .3

=>5^2x: 5³ = 5² .3 + 2.5²

=>5^2x: 5³ = 5² .5

=>5^2x = 5² .5.5³

=>5^2x = 5⁶

=> 2x = 6

=> x=3

a) 5x = 125

x = 125 : 5

x = 25

b) 32x = 81

x = 81 : 32

x = 81/ 32

c) 52x - 3 - 2.52 = 52.3

52x - 3 - 104 = 156

x - 3 - 104 = 156 : 52

x - 3 - 104 = 3

x - 3 = 3 + 104

x - 3 = 107

x = 107 + 3

x = 110

Ko chắc lắm , sai thì Sorry nhé .

a: \(x-\frac13x+\frac15x=-\frac{26}{5}\)

=>\(x\left(1-\frac13+\frac15\right)=-\frac{26}{5}\)

=>\(x\left(\frac23+\frac15\right)=-\frac{26}{5}\)

=>\(x\cdot\left(\frac{10}{15}+\frac{3}{15}\right)=-\frac{26}{5}\)

=>\(x\cdot\frac{13}{15}=-\frac{26}{5}\)

=>\(x=-\frac{26}{5}:\frac{13}{15}=-\frac{26}{5}\cdot\frac{15}{13}=-2\cdot3=-6\)

b: \(\frac23\left(x+\frac95\right)-\frac{3}{10}\left(5x-\frac13\right)=\frac{7}{15}\)

=>\(\frac23x+\frac{18}{15}-\frac32x+\frac{1}{10}=\frac{7}{15}\)

=>\(\frac{-5}{6}x+\frac65+\frac{1}{10}=\frac{7}{15}\)

=>\(-\frac56x+\frac{13}{10}=\frac{7}{15}\)

=>\(-\frac56x=\frac{7}{15}-\frac{13}{10}=\frac{14}{30}-\frac{39}{30}=\frac{-25}{30}=-\frac56\)

=>x=1

Bài này dễ mà, you có thể tự làm được

12.(x-3):3=64+8

12.(x-3):3=72

12.(x-3)   =72.3

12.(x-3)   =216

     x-3     =216:12

      x-3    =18

      x       =18+3

       x      =21

100-7.(x-5)=65

       7.(x-5)=100-65

       7.(x-5)=35

           x-5=35:7

           x-5=5

           x   =5+5

            x   =10

Vậy x = 10