Ответы и объяснения

2014-02-23T21:15:19+04:00
2/10 = 1/5   5/10 = 1/2 2/20 = 1/10 25/50 = 1/10 4/2 = 1/2 50/100 = 1/2 6/3 = 1/2 50/200=1/4 50/100=1/2 45/95= 1/2