Question

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Answer 1

Ответ:

$5) 5-2\frac{1}{7} = 4\frac{7}{7} -2\frac{1}{7} =(4-2)(\frac{7}{7}-\frac{1}{7})=2\frac{6}{7} \\6) 11-10\frac{2}{5} =10\frac{5}{5} -10\frac{2}{5} =(10-10)(\frac{5}{5}-\frac{2}{5} )=\frac{3}{5}=0,6$