Вопрос:
13) 12 − 5 13/18; 14) 10 18/25 − 8; 15) 8 11/20 + 5 13/24; 16) 9 17/21 − 7; 17) 9 − 7 18/20; 18) 12 5/7 + 4 11/49; 19) 6 11/20 + 4 7/15; 20) 5 13/16 + 3; 21) 10 1/18 − 4 2/3; 22) 8 − 1 5/6; 23) 7 12/16 − 4; 24) 2 5/6 + 1 3/4.
Ответ:
- \(12-5\frac{13}{18}=11\frac{18}{18}-5\frac{13}{18}=6\frac{5}{18}\).
- \(10\frac{18}{25}-8=2\frac{18}{25}\).
- \(8\frac{11}{20}+5\frac{13}{24}=13+\frac{132+65}{240}=13\frac{197}{240}\).
- \(9\frac{17}{21}-7=2\frac{17}{21}\).
- \(9-7\frac{18}{20}=8\frac{20}{20}-7\frac{18}{20}=1\frac{2}{20}=1\frac{1}{10}\).
- \(12\frac{5}{7}+4\frac{11}{49}=16+\frac{35+11}{49}=16\frac{46}{49}\).
- \(6\frac{11}{20}+4\frac{7}{15}=10+\frac{33+28}{60}=11\frac{1}{60}\).
- \(5\frac{13}{16}+3=8\frac{13}{16}\).
- \(10\frac{1}{18}-4\frac{2}{3}=10\frac{1}{18}-4\frac{12}{18}=5\frac{7}{18}\).
- \(8-1\frac{5}{6}=7\frac{6}{6}-1\frac{5}{6}=6\frac{1}{6}\).
- \(7\frac{12}{16}-4=3\frac{12}{16}=3\frac{3}{4}\).
- \(2\frac{5}{6}+1\frac{3}{4}=3+\frac{10+9}{12}=4\frac{7}{12}\).