\(=\frac{\left(3\cdot3\cdot5\right)^{10}\cdot5^{20}}{\left(3\cdot5\cdot5\right)^{15}}\)

\(=\frac{3^{10}\cdot3^{10}\cdot5^{10}\cdot5^{20}}{3^{15}\cdot5^{15}\cdot5^{15}}\)

\(=\frac{3^{20}\cdot5^{30}}{3^{15}\cdot5^{30}}\)

\(=3^5=243\)

nhớ nha

a) \(\frac{45^{10}.5^{20}}{75^{15}}\)

=
\(\frac{\left(5.9\right)^{10}.5^{20}}{\left(5.15\right)^{15}}\)

=  \(\frac{5^{10}.9^{10}.5^{20}}{5^{15}.15^{15}}\)

=    \(\frac{5^{10}.3^{20}.5^{20}}{5^{15}.15^{15}}\)

=    \(\frac{5^{10}.15^{20}}{5^{15}.15^{15}}\)

=     \(\frac{15^5}{5^5}\)

=     \(\frac{3^5.5^5}{5^5}\)

= \(3^5\)

b) \(\frac{\left(0,8\right)^5}{\left(0,4\right)^6}\)

=   \(\frac{\left(0,4\right)^5.2^5}{\left(0,4\right)^6}\)

=    \(\frac{2^5}{0,4}\)

= \(2^5\) : 0,4

(=) 32 : \(\frac{2}{5}\)

= 90

c) \(\frac{2^{15}.9^4}{6^6.8^3}\)

=  \(\frac{2^{15}.\left(3^2\right)^4}{\left(2.3\right)^6.\left(2^3\right)^3}\)

=    \(\frac{2^{15}.3^8}{2^6.3^6.2^9}\)

=   \(3^2\)

\(\frac{45^{10}\times5^{20}}{75^{15}}=\frac{3^{20}\times5^{10}\times5^{20}}{3^{15}\times5^{30}}=3^5=243\)

5 giờ 20 phút= \(\frac{16}{3}\) giờ

Đổi 5 giờ 20 phút = ... giờ

 DDooir :

5 giờ 20 phút = 5,333....giờ

5 giờ 20 phút = \(\frac{16}{3}\)giờ

bằng 5 20/60 giờ = 5 2/6 giờ = 32/6 giờ

1 ) 

(-10 + 5) -(4-x)=12 -(5-6)                                   

<=> -10 + 5 - 4 + x = 12 - 5 + 6 

<=> x = 12 - 5 + 6 + 10  - 5 + 4 

<=> x = 22

2 )

14-(5-8+3-x)=|-7+10|

<=> 14 - 5 + 8 - 3 + x = | 3 | 

<=> x = | 3 | -14 + 5 - 8 + 3 

<=> x = 3 - 14 + 5 - 8 + 3 

<=> x = -11 

3 )

-19-(3 +x-5)=|4-15+2|

<=> -19 - 3 - x + 5 = | -9 | 

<=> -x = | -9 | - 5 + 19 + 3 

<=> -x = 9 - 5 + 19 + 3 

<=> -x = 26

<=> x = -26 

4 )

45-(x+45-3)=|-7+3|

<=> 45 - x - 45 + 3 = | -4 | 

<=> -x + 3 = | -4 |

<=> -x = 4 - 3

<=> -x = 1

<=> x =-1

10 )

-(-12 +4-10)-(4-x)=-(-3)

<=> 12 - 4 + 10 - 5 + x = 3 

<=> x = 3 -12 + 4 - 10 +  5

<=> x = -10 

Mình là Siêu Phẩm Hacker , rất mong được thi đấu một lần vs Edokawa conan  

1) (-10 + 5) - (4 - x) = 12 - (5 - 6)

=> -5 - 4 + x = 12 + 1

=> -5 - 4 + x = 13

=> 4 + x = -5 - 13

=> 4 + x = - 18

=> x = -18 - 4

=> x = -22

2) 14 - (5 - 8 + 3 - x) = |-7 + 10|

=> 14 + 5 + 8 - 3 + x = |3|

=> 24 + x = 3

=> x = 3 - 24

=> x = -21

3) -19 - (3 + x - 5) = |4 - 15 + 2|

=> -19 - 3 - x + 5 = |-9|

=> -17 - x = 9

=> x = -17 - 9

=> x = -26

4) 45 - (x + 45 - 3) = |-7 + 3|

=> 45 - x - 45 + 3 = |-4|

=> 3 - x = 4

=> x = 3 - 4

=> x = -1

5) -(-12 + 4 - 10) - (4 - x) = -(-3)

=> -(-29) - (4 - x) = 3

=> 29 - (4 - x) = 3

=> 4 - x = 29 - 3

=> 4 - x = 26

=> x = 4 - 26

=> x = -22

500 - 400 =100

750 - 150 = 600

75km - 35km = 40km

170 - 100 = 70

95 - 45 = 50

500-400=100

750-150=600

75 km - 35 km = 40 km

170 - 100= 70

95 - 45 = 50

500-400=100

750-150=600

75km-35km=40km

170-100=70

95-45=50