№1. Выполните действия: а) (20rac{17}{37} + 14rac{12}{37} + 31rac{8}{37}) б) (6rac{100}{107} + 9rac{106}{107}) в) (12rac{19}{32} - 4rac{3}{32}) г) (150rac{}{}-rac{149}{150}) д) (17rac{2}{13} - 16rac{5}{13})

а) (20rac{17}{37} + 14rac{12}{37} + 31rac{8}{37} = (20+14+31) + (rac{17}{37} + rac{12}{37} + rac{8}{37}) = 65 + rac{17+12+8}{37} = 65 + rac{37}{37} = 65 + 1 = 66) б) (6rac{100}{107} + 9rac{106}{107} = (6+9) + (rac{100}{107} + rac{106}{107}) = 15 + rac{100+106}{107} = 15 + rac{206}{107} = 15 + 1rac{99}{107} = 16rac{99}{107}) в) (12rac{19}{32} - 4rac{3}{32} = (12-4) + (rac{19}{32} - rac{3}{32}) = 8 + rac{19-3}{32} = 8 + rac{16}{32} = 8 + rac{1}{2} = 8rac{1}{2}) г) (150 - rac{149}{150} = 149rac{150}{150} - rac{149}{150} = 149rac{150-149}{150} = 149rac{1}{150}) д) (17rac{2}{13} - 16rac{5}{13} = (17-16) + (rac{2}{13} - rac{5}{13}) = 1 - rac{3}{13} = rac{13}{13} - rac{3}{13} = rac{10}{13})