Question

alguém me por favor ​

Answer 1

$a) \frac{8}{5} – \frac{10}{5} + \frac{1}{5} = \frac{8 - 10 + 1}{5} = –1 = – \frac{1}{5}$

$b) ( - 2,25) + ( - 10,3) = - 2,25 - 10,3 = - 12,55$

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$c) - \frac{2}{3} - \frac{1}{4} = - \frac{8 + 3}{12} = - \frac{11}{12}$

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$e) \frac{1}{4} - \frac{2}{3} = \frac{3 - 8}{12} = \frac{ - 5}{12} = - \frac{5}{12}$

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$f) \frac{3}{5} + \frac{2}{3} + \frac{1}{2} = \frac{18 + 20 + 15}{30} = \frac{53}{30}$

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$g) ( + 15,2) - ( - 3,25) = 15,2 + 3,25 = 18,45$

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$+ \frac{2}{9} - \frac{1}{6} = \frac{4 - 3}{18} = \frac{1}{18} = alternativa \: A.$

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$3 \times ( - 0,002) = - (3 \times 0,002) = - 0,006 = alternativa \: B.$

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$- 3,2 \times ( - 0,65) = 3,2 \times 0,65 = 2,08 =alternativa \: A.$

|| ASS: Blues / 21|08|21 / às 15:49