Сократите дроби в) 2/8,8/24,12/28,45/100 д)12/18,18/20,20/24,24/30 ж)25/56,144/120,156/128,396/240.

в) 2/8 = 2/(2 * 4) = 1/4.

8/24 = (2 * 2 * 2)/(2 * 2 * 2 * 3) = 1/3.

12/28 = (2 * 2 * 3)/(2 * 2 * 7) = 3/7.

45/100 = (5 * 3 * 3)/(5 * 2 * 2 * 5) = 9/20.

д) 12/18 = (2 * 2 * 3)/(2 * 3 * 3) = 2/3.

18/20 = (2 * 3 * 3)/(2 * 2 * 5) = 9/10.

20/24 = (2 * 2 * 5)/(2 * 2 * 2 * 3) = 5/6.

24/30 = (2 * 2 * 2 * 3)/(2 * 5 * 3) = 4/5.

ж) 25/56 - не сокращается.

144/120 = (12 * 12)/(12 * 10) = 12/10 = (2 * 6)/(2 * 5) = 6/5 = 1 + 1/5.

156/128 = (2 * 2 * 39)/(2 * 2 * 32) = 39/32 = 1 + 7/32.

396/240 = (3 * 3 * 41)/(3 * 80) = 123/80 = 1 + 43/80.