Question

7 Calculați:
Repede va rog!!​

Answer 1

Răspuns:

$a) \:\frac{1}{3} \cdot\Big( \frac{2}{5} + \frac{1}{5} \Big) = \frac{1}{ \not3} \cdot \frac{ \not3}{5} = \bf{\frac{1}{5}}$

$b) \: \frac{15}{14} + \frac{1}{2} \cdot \frac{5}{7} = \frac{15}{14} + \frac{5}{14} = \frac{20 {}^{(2} }{14} = \bf{ \frac{10}{7} }$

$c) \: \frac{ \not2}{ \not9} \cdot \frac{ \not3}{ \not4} + \frac{1}{2} \cdot \frac{5}{3} = \frac{1}{3} \cdot \frac{1}{2} + \frac{5}{6} = \frac{1}{6} + \frac{5}{6} = \frac{6}{6} = \bf{ 1 }$

$d) \: \frac{ \not7}{ \not6} \cdot \frac{16}{\not5} \cdot \frac{\not15}{ \not14} \cdot \not2 = \frac{1}{\not3} \cdot \not16 \cdot \frac{\not3}{\not2} = \bf{8}$

Answer 2

Răspuns:

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