\(\frac{17.8.23.\left(-80\right).3}{23.16.17.4}=\frac{8.\left(-80\right).3}{16.4.17}=\frac{1.\left(-20\right).3}{2.1.17}=\frac{\left(-10\right).3}{1.17}=\frac{-30}{17}=-1\frac{13}{17}\)

Bằng -30 nha bạn chắc chắn 100%

a) \(17+188+183=205+183=388\)

b) \(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-\left(130-64\right)\)

\(80-66=14\)

c) \(2^3.17-2^3.14\)

\(8.17-8.14\)

\(=8.\left(17-14\right)\)

\(=8.3=24\)

a) \(\frac{17}{23}.\frac{18}{16}.\frac{23}{17}-\left(-80\right)-\frac{3}{4}\)

= \(\frac{17.18.23}{23.16.17}+80-\frac{3}{4}\)

= \(\frac{9}{8}+80-\frac{3}{4}\)

= \(\frac{3}{8}+80=\frac{643}{8}\)

b) \(\frac{5}{11}.\frac{18}{29}-\frac{5}{11}.\frac{8}{29}+\frac{5}{11}.\frac{19}{29}\)

= \(\frac{5}{11}.\left(\frac{18}{29}-\frac{8}{29}+\frac{19}{29}\right)\)

= \(\frac{5}{11}.1=\frac{5}{11}\)

c) \(\left(\frac{13}{23}+\frac{1313}{2323}-\frac{131313}{232323}\right).\left(\frac{1}{3}+\frac{1}{4}-\frac{7}{12}\right)\)

= \(\left(\frac{13}{23}+\frac{1313}{2323}-\frac{131313}{232323}\right).0\)

= \(0\)

+) \(176+483+24+117\)

\(=\left(176+24\right)+\left(483+117\right)\)

\(=200+600\)

\(=800\)

+) \(239+518+761+482\)

\(=\left(239+761\right)+\left(518+482\right)\)

\(=1000+1000\)

\(=2000\)

+) \(32+33+34+...+78+79+80\)

Số số hạng của dãy là :

\(\left(80-32\right):1+1=49\) (số)

Tổng của dãy là :

\(\frac{\left(80+32\right)\times49}{2}=2744\)

+) \(5\times125\times2\times4\)

\(=\left(5\times2\right)\times\left(125\times4\right)\)

\(=10\times500\)

\(=5000\)

+) \(25\times50\times4\times20\)

\(=\left(25\times4\right)\times\left(50\times20\right)\)

\(=100\times1000\)

\(=100000\)

+) \(17\times32+43\times17+17\times25\)

\(=17\times\left(32+43+25\right)\)

\(=17\times100\)

\(=1700\)

+) \(24\times19+29\times24+18\times24+24\times33+24\)

\(=24\times\left(19+29+18+33+1\right)\)

\(=24\times100\)

\(=2400\)

_Chúc bạn học tốt_

176+483+24+117

=176+24+483+117

=200+600

=800

g: =1000+600+130=1730

=(623+377)+(282+318)

=1000+600

=1600+130

=1730