Привет! Сейчас решим эти примеры. Будь внимателен, и у тебя всё получится!
- \(2 \frac{7}{19} + 6 \frac{12}{19} = 8 \frac{19}{19} = 9\)
- \(3 \frac{5}{8} - \frac{3}{8} = 3 \frac{2}{8} = 3 \frac{1}{4}\)
- \(\frac{2}{43} + 1 = 1 \frac{2}{43}\)
- \(12 \frac{3}{16} - 2 \frac{7}{20} = 12 \frac{15}{80} - 2 \frac{28}{80} = 11 \frac{95}{80} - 2 \frac{28}{80} = 9 \frac{67}{80}\)
- \(\frac{13}{21} + \frac{10}{21} = \frac{23}{21} = 1 \frac{2}{21}\)
- \(7 \frac{5}{21} - 4 \frac{13}{42} = 7 \frac{10}{42} - 4 \frac{13}{42} = 6 \frac{52}{42} - 4 \frac{13}{42} = 2 \frac{39}{42} = 2 \frac{13}{14}\)
- \(11 \frac{5}{12} + \frac{1}{12} = 11 \frac{6}{12} = 11 \frac{1}{2}\)
- \(\frac{7}{24} + \frac{11}{40} = \frac{35}{120} + \frac{33}{120} = \frac{68}{120} = \frac{17}{30}\)
- \(1 - \frac{12}{25} = \frac{25}{25} - \frac{12}{25} = \frac{13}{25}\)
- \(21 \frac{7}{34} - 6 \frac{8}{51} = 21 \frac{21}{102} - 6 \frac{16}{102} = 15 \frac{5}{102}\)
- \(4 \frac{5}{9} + 2 \frac{11}{27} = 4 \frac{15}{27} + 2 \frac{11}{27} = 6 \frac{26}{27}\)
- \(28 \frac{9}{25} - 15 \frac{5}{8} = 28 \frac{72}{200} - 15 \frac{125}{200} = 27 \frac{272}{200} - 15 \frac{125}{200} = 12 \frac{147}{200}\)
- \(5 \frac{3}{5} \cdot 2 \frac{13}{21} = \frac{28}{5} \cdot \frac{55}{21} = \frac{4}{1} \cdot \frac{11}{3} = \frac{44}{3} = 14 \frac{2}{3}\)
- \(24 \cdot 3 \frac{1}{4} = 24 \cdot \frac{13}{4} = 6 \cdot 13 = 78\)
- \(3 \frac{1}{6} \cdot \frac{5}{19} = \frac{19}{6} \cdot \frac{5}{19} = \frac{5}{6}\)
- \(4 \frac{1}{5} \cdot \frac{15}{49} = \frac{21}{5} \cdot \frac{15}{49} = \frac{3}{1} \cdot \frac{3}{7} = \frac{9}{7} = 1 \frac{2}{7}\)
- \(12 : 1 \frac{1}{3} = 12 : \frac{4}{3} = 12 \cdot \frac{3}{4} = 3 \cdot 3 = 9\)
- \(3 \frac{4}{9} : \frac{2}{27} = \frac{31}{9} \cdot \frac{27}{2} = \frac{31}{1} \cdot \frac{3}{2} = \frac{93}{2} = 46 \frac{1}{2}\)
- \(1 \frac{5}{18} : 1 \frac{8}{15} = \frac{23}{18} : \frac{23}{15} = \frac{23}{18} \cdot \frac{15}{23} = \frac{1}{6} \cdot \frac{5}{1} = \frac{5}{6}\)
- \(\frac{25}{28} : 2 = \frac{25}{28} \cdot \frac{1}{2} = \frac{25}{56}\)
Ответ: смотри решение выше
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