\(\frac{5^2\cdot3^3-25\cdot17}{25\cdot3^2-5^2\cdot8}\)

\(=\frac{25\cdot\left(27-17\right)}{25\left(9-8\right)}\)

\(=\frac{25\cdot17}{25\cdot1}\)

\(=17\)

Nhầm đoạn cuối :

\(=\frac{25\cdot10}{25\cdot1}\)

\(=10\)

Sorry ( ko gạch đá )

\(\frac{5^2.3^3-25.17}{25.3^2-5^2.8}=\frac{5^2.\left(3^3-17\right)}{5^2.\left(3^2-8\right)}\)

\(=\frac{5^2.10}{5^2.1}=10\)

#

A

a

25.3-x=104

75-x=104

x=75-104

x=-29

3(5x-15)-52=68

3(5x-15)=68+52

3(5x-15)=120

5x-15=120:3

5x-15=40

5x=40+15

5x=55

x=55:5

x=11

5(x+35)=515

x+35=515:5

x+35=103

x=103-35

x=68

   5^2.53-50.17+25.3^4

=25.53-25.2.17+25.81

=25(53+81-34)

=25(134-34)

=25.100=2500

C2

3/5.x=30

x= 30:3/5

x=30.5/3

x=50

25.3 + 25 = 100

tk và kb với mk nhé mk năn nỉ bạn đó.

50,3 tk m nhé

25 x 3 + 25

= 25 x 3 + 25 x 1

= 25 x ( 1 + 3 )

= 25 x 4 

= 100

\(1000:8+25\cdot3\)

\(=25\cdot40:8+25\cdot3\)

\(=25\cdot5+25\cdot3\)

\(=25\cdot\left(5+3\right)\)

\(=25\cdot8\)

\(=200\)

1000:8+25.3

= 125 + 75 

=200

x=826

nếu đúng thì tick cho mình nha các bạn

Có 120 + 25.3 = (x - 46) : 4 

=> 120 + 75 = (x - 46) : 4 

=> 195 = (x - 46) : 4

=> x - 46 = 780

=> x = 826

Đáp án cần chọn là: D

A = 2 5 .7 + 2 5 2 5 .5 2 − 2 5 .3 = 2 5 . ( 7 + 1 ) 2 5 . ( 5 2 − 3 ) = 2 5 . ( 7 + 1 ) 2 5 . ( 25 − 3 ) = 2 5 .8 2 5 .22 = 8 22 = 4 11 B = 3 4 .5 − 3 6 3 4 .13 + 3 4 = 3 4 . ( 5 − 3 2 ) 3 4 . ( 13 + 1 ) = 3 4 . ( 5 − 9 ) 3 4 .14 = 3 4 . ( − 4 ) 3 4 .14 = − 4 14 = − 2 7

MSC = 77

4 11 = 4.7 11.7 = 28 77 ; − 2 7 = − 2.11 7.11 = − 22 77

Do đó  − 22 77 < 28 77 < 1  hay B < A < 1