Question

Выполните действие в скобках и сократите дроби
1) (111+172)*89/(111+182)*89

2)(241-230)-(487+222)/(499-468)*(1000-291)

3) (2000-1993)*(1011-789)/(2008-1989)*(139+83)

Answer 1

1)
(111+172)*89 / (111+182)*89 =
= 283*89 / 293*89 = 283/293

2)
(241-230)*(487+222) / (499-468)*(1000-291) = 
= 11*709 / 31*709 = 11/31,

3)
= (2000-1993)*(1011-789) / (2008-1989)*(139+83) = 
= 7*222 / 19*222 = 7/19