Question

ayúdenme con estas sumas y restas de fracción

4/5 + 10/12 + 2/9 =

10/18 + 4/6 + 9/15=

9/6 - 4/9 - 2/5 =

6/3 - 3/5 - 8/9 =

Answer 1

AQUI ESTA :

•  167/90  , decimal 1,8 5
• 82 /45  , decimal 1,8 2
• 59 /90   , decimal 0,6 5
• 23 /45   , decimal 0,5 1

Answer 2

$\frac{A}{B} +/- \frac{C}{D} = \frac{A*D +- B*C}{B*D}$

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1) $\frac{4}{5} + \frac{10}{12} = \frac{48 + 50}{60} = \frac{98}{60} = \frac{49}{30} \\\\\frac{49}{30} + \frac{2}{9} = \frac{441 + 60}{270} = \frac{501}{270} = \frac{167}{90}\\\\\\\\\frac{4}{5} + \frac{10}{12} + \frac{2}{9} = \frac{167}{9}$

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2) $\frac{10}{18} + \frac{4}{6} = \frac{60 + 72}{108}= \frac{132}{108} -- Simplificando = \frac{11}{9} + \frac{9}{15} = \frac{165+ 81}{145} = \frac{246}{135} = \frac{82}{45} \\\\\\\frac{10}{18} + \frac{4}{6}+ \frac{9}{15} = \frac{82}{45}$

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3) $\frac{9}{6} - \frac{4}{9} = \frac{81-24}{54} = \frac{57}{54} -- Simplificando=\frac{19}{18} \\\\\frac{19}{18} - \frac{2}{5} = \frac{95 - 36}{90}= \frac{59}{90} \\\\\frac{9}{6} - \frac{4}{9} - \frac{2}{5} = \frac{59}{90}$

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4) $\frac{6}{3} - \frac{3}{5} = \frac{30 - 9}{15} = \frac{21}{15} -- Simplificando = \frac{7}{5} \\\\\frac{7}{5} - \frac{8}{9} = \frac{63 - 40}{45} = \frac{23}{45} \\\\\\\frac{6}{3} - \frac{3}{5} - \frac{8}{9} = \frac{23}{45}$