Question

Mă puteți ajuta va rog daca puteți să mi arătați și calculele....

Answer 1

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Answer 2

$1) \\ \\ a) \\ \\ \frac{1}{2} - \frac{2}{5} + \frac{1}{3} = \frac{15 - 12 + 12}{30} = \frac{13}{30} \\ \\ b) \\ \\ 9 \frac{3}{25} : (7 \frac{1}{5} - 3 \frac{1}{10} + 6 \frac{1}{2}) = \\ \\ (7 \frac{1}{5} - 3 \frac{1}{10} + 6 \frac{1}{2}) = \\ \\ \frac{228}{25} : \frac{53}{5} = \frac{1140}{1325} = \frac{228}{265} \\ \\ c) \\ \\ 1 - \frac{1}{3} + \frac{1}{2} - \frac{1}{5} + \frac{1}{4} = \\ \\ 60 - 20 + 30 - 12 + 15 = \frac{73}{60} \\ \\ d) \\ \\ \frac{3}{4} \times ( \frac{8}{9} - \frac{1}{6}):\frac{5}{7} = \\ \\ \frac{3}{4} \times ( \frac{8}{9} - \frac{1}{6}) = \\ \\ \frac{13}{24}: \frac{5}{7} = \frac{13 \times 7}{24 \times 5} = \frac{91}{120} \\ \\ e) \\ \\ ( \frac{3}{4} + \frac{5}{6} - \frac{2}{3}) \times \frac{12}{5} = \\ \\ \frac{11}{12} \times \frac{12}{5} = \frac{132}{60} = \frac{11}{5} = 2,2 \\ \\ 2) \\ \\ a) \\ \\ \frac{2}{9} \times x = 3 \frac{1}{3} \\ \\ 6x = 9 \times 10 = 90 \\ \\ \frac{6x}{6} = \frac{90}{6} \\ \\ x = \frac{90}{6} = 15$