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(35+17)+(17+20-35)
=35+17+17+20-35
=(35-35)+(17+17+20)
=0+54
=54
tk m nha!
`a) 465 + [ 58 + ( -465 ) + ( -38 ) ]`
`= 465 + 58 - 465 -38`
`= (465-465) + (58-38)`
`=0+ 20`
`=20`
`b) ( 35 - 17 ) + ( 17 + 20 - 35 )`
`= 35 -17 +17 +20-35`
`= (35-35) + (-17+17)+20`
`= 0 + 0 +20`
`=20`
a)465+[58+(−465)+(−38)]
=465+58−465−38=465+58−465−38
=(465−465)+(58−38)=(465−465)+(58−38)
=0+20=0+20
=20=20
�)(35−17)+(17+20−35)b)(35−17)+(17+20−35)
=35−17+17+20−35=35−17+17+20−35
=(35−35)+(−17+17)+20=(35−35)+(−17+17)+20
=0+0+20=0+0+20
=20=20
(35-17)+(17+20-35)
=35-17+17+20-35
=(35-35)+(-17+17)+20
=0+0+20
=20
\(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{17}{-35}+\frac{-8}{13}\)
\(=\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{-17}{35}+\frac{-8}{13}\)
\(=\left(\frac{3}{17}+\frac{14}{17}\right)+\left(\frac{-5}{13}+\frac{-8}{13}\right)+\left(\frac{-18}{35}+\frac{-17}{35}\right)\)
\(=\frac{17}{17}+\frac{-13}{13}+\frac{-35}{35}\)
\(=1+\left(-1\right)+\left(-1\right)\)
\(=-1\)
\(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{17}{-35}+\frac{-8}{13}\)
= \(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{-17}{35}+\frac{-8}{13}\)
= \(\left(\frac{3}{17}+\frac{14}{17}\right)+\left(\frac{-5}{13}+\frac{-8}{13}\right)+\frac{-18}{35}\)
= 1+(-1)+\(\frac{-18}{35}\)
= 0+\(\frac{-18}{35}\)
= \(\frac{-18}{35}\)
(35 - 17) - (-17 + 20 + 35)
=35-17+17-20-35
=35-35-17+17-20
=-20
\(\left(35-17\right)-\left(-17+20+35\right)\\ =18-\left(3+35\right)\\ =18-38\\ =-20\)