Question

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Answer 1

У. $9frac{3}{20} - 2frac{3}{25} - 4 = 9frac{15}{100} - 2frac{12}{100} - 4 = 7frac{3}{100} - 4 = 3frac{3}{100}$

Л. $13-5frac{7}{12}-1frac{4}{15} = 13 - (5frac{7}{12}+1frac{4}{15}) = 13 - (5frac{35}{60} + 1frac{16}{20}) = 13 - 6frac{51}{60} = 13 - 6frac{17}{20} = 7-frac{17}{20} = 6frac{3}{20}$

Г. $5frac{11}{42}-2frac{3}{14}-1frac{1}{21}=5frac{11}{42}-2frac{9}{42}-1frac{2}{42}=2frac{11-9-2}{42}=2$

Б. $11 - 6frac{13}{21}-frac{3}{14} = 11 - (6frac{13}{21} + frac{3}{14}) = 11 - (6frac{26}{42} + frac{9}{42}) = 11-6frac{35}{42}=11-6frac{5*7}{6*7}=11-6frac{5}{6} = 5-frac{5}{6} = 4frac{1}{6}$