a 60 - 26,75 - 13,25

= 60 - ( 26,75 + 13,25 )

= 60 - 40

= 20

b ) 45,78 + 38,42 - 25,78 - 18,42

= ( 45,78 - 25,78 ) + ( 38,42 - 18,42 )

= 20 + 20

= 40

a=20

b=40

c=7290

d=26

a,60-26.75-13.25

=60-26.3.25-13.25

=60-78.25-13.25

=60-25.(78+13)

=60-2275

=-2215

25.78 + 5² . 12 - 25 . 10

= 25 . 78 + 25 . 12 - 25 . 10

= 25 . ( 78 + 12 - 10 )

= 25 . 80

= 2000

\(25.78+5^2.12-25.10\)

\(=1950+300-250\)

\(=2000\)

\(k\)đi nha bạn

25 . 78 + 5². 12 - 25 . 10

= 25 . 78 + 25 . 12 - 25 .10

= 25. ( 78 + 12 - 10 )

= 25 . 80

= 2000

Lâu rồi không giải không bít đúng ko !!!

37.12 + 37 .88 - 137.25 + 37.25

= 37. ( 12 + 88) - 25.( 137 - 37)

= 37. 100 - 25 . 100

= 100.( 37 - 25)

= 100. 12

= 1200

37.12 + 37 .88 - 137.25 + 37.25

= 37. ( 12 + 88) - 25.( 137 - 37)

= 37. 100 - 25 . 100

= 100.( 37 - 25)

= 100. 12

= 1200

37.12 + 37 .88 - 137.25 + 37.25

= 37. ( 12 + 88) - 25.( 137 - 37)

= 37. 100 - 25 . 100

= 100.( 37 - 25)

= 100. 12

= 1200

\(\frac{-4}{15}.\frac{25}{8}=\frac{-4.25}{15.8}=\frac{-100}{120}=\frac{-5}{6}\)

\(\frac{5}{-14}.\frac{-7}{10}=\frac{5.\left(-7\right)}{-14.10}=\frac{-35}{-140}=\frac{35}{140}=\frac{1}{4}\)

đơn giản

tra loi di

roi minh cho

3.5^x = 60.5⁸ + 15.25⁴

3.5^x = 3.4.5.5⁸ + 3.5.5⁸

3.5^x = 3.5⁹.(4 + 1)

3.5^x = 3.5¹⁰

Vậy x = 10

             Bài làm

\(3.5^x\)= \(60.5^8\)+ \(15.25^4\)

\(3.5^x\)= \(3\).\(4\).\(5\).\(5^8\)+ \(3.5\).\(5^8\)

\(3.5^x\)= \(3\). \(5^9\).\(\left(4+1\right)\)

\(3.5^x\)= \(3\).\(5^9\). \(5\)

\(3.5^x\)= \(3\).\(5^{10}\)

=> x      = 10

Vậy: x=10

C1:

= 49,9 x 5,2

= 259,48

C2:

= 34,65 x 5,2 + 15,25 x 5,2

= 180,18 + 79,3

= 259,48

Cách 1

( 34,65 + 15,25 ) x 5,2

= 49,9 x 5,2

= 259,48

Cách 2 :

( 34,65 + 15,25 ) x 5,2

= 34,65 x 5,2 + 15,25 x 5,2

= 180,18 + 79,3

= 259,48