Question

помогите пожалуйста!!номер 2

Answer 1

1)5/12+1/12+1/4 = 5/12+1/12+3/12 = 9/12 = 3/4

2)1/25+3/20+4/25+1/20 = 5/25+4/20 = 1/5 + 1/5 = 2/5

3)3/5+5/6-7/30 = 18/30 + 25/30 - 7/30 = 1 целая и 1/5