Question

\(\frac{999}{1000}+\frac{998}{1000}+\frac{997}{1000}+...+\frac{1}{1000}\)

Answer 1

= (999/1000+1/1000)+(998/1000+2/1000)+.......+(501/1000+499/1000)+500/1000

= 1+1+.....+1+1/2 ( có 499 số 1 )

= 499 + 1/2

= 999/2

Answer 2

= \(\frac{999+998+997+...+1}{100}\)  =

bạn tự làm tiếp nhé

Answer 3

= (999/1000+1/1000)+(998/1000+2/1000)+.......+(501/1000+499/1000)+500/1000

= 1+1+.....+1+1/2 ( có 499 số 1 )

= 499 + 1/2

= 999/2

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Answer 4

= (999/1000+1/1000)+(998/1000+2/1000)+.......+(501/1000+499/1000)+500/1000

= 1+1+.....+1+1/2 ( có 499 số 1 )

= 499 + 1/2

= 999/2