\(5^6\text{ : }5^4+2^3\cdot2^2-1^{2017}\)

\(=5^2+2^5-1\)

\(=25-32-1\)

\(=-7-1\)

\(=-8\)

\(23\cdot75+25\cdot10+25\cdot13+180\)

\(=23\cdot5\cdot25+25\cdot10+25\cdot13+25\cdot7,2\)

\(=25\cdot\left(23\cdot5+10+13+7,2\right)\)

\(=25\cdot145,2\)

\(=3630\)

1) 5⁶ : 5⁴ + 2³ . 2² - 1²⁰¹⁷

= 5² + 2⁵ - 1

= 25 + 32 - 1

= 57 - 1

= 56

2) 23 . 75 + 25 . 10 + 25 . 13 + 180

= 23 . 75 + 25 ( 10 + 13 ) + 180

= 23 . 75 + 25 . 23 + 180

= 23 ( 75 + 25 ) + 180

= 23 . 100 + 180

= 2300 + 180

= 2480

=))

a, \(\dfrac{7}{15}\)+\(\dfrac{18}{54}\)
=  \(\dfrac{7}{15}\)+ \(\dfrac{1}{3}\)
=  \(\dfrac{7}{15}\)+\(\dfrac{5}{15}\)
=    \(\dfrac{12}{15}\) = \(\dfrac{4}{5}\) =0,8
b, \(\dfrac{12}{25}\)+\(\dfrac{23}{75}\)-\(\dfrac{1}{4}\)
=     \(\dfrac{59}{75}\)   -\(\dfrac{1}{4}\)
=         \(\dfrac{161}{300}\)
   

a, 7/15 + 18/54 = 4/5

a) 25 –[ 50 – (  2 3  . 17 –  2 3  . 14 )]

= 25 – ( 50 –  2 3 . 3 ) = 25 – ( 50 – 24 )

= 25 – 26 = -1

23 x 75 + 25 x 23 + 180

= 23 x (75 +25 ) +180

= 23 x 100 + 180

= 2300+180

=2480

ủng hộ mik nha

23×75+25×23+180

=23×75+25×23+ 25 + 130

= 23 x ( 75 + 23 + 2 ) + 130

= 23 x 100 + 130

=2300 + 120

=2420

23 x 75 + 25 x 23 + 180

= 23 x ( 75 + 25 ) + 180

= 23 x 100 + 180

= 2300 + 180 

= 2480

a) 25 –[ 50 – (  2 3   .   17   –   2 3   . 14 )]

= 25 – ( 50 – 23 . 3 ) = 25 – ( 50 – 24 )

= 25 – 26 = -1

b) |-128| : [  45 2   –   (   2010   –   2008 0   .   1 2010 )]

= 128 : [ 2025 – ( 2010 – 1 . 1 )] = 128 : ( 2025 – 2009 ) = 128 : 16 = 8