Question

\(\dfrac{5}{6}+\dfrac{7}{8}=\dfrac{ }{ }\)

\(\dfrac{5}{8}-\dfrac{2}{5}\) =

\(\dfrac{9}{10}x\dfrac{5}{6}=\)

\(\dfrac{6}{5}:\dfrac{3}{7}=\)

Answer 1

\(\dfrac{5}{6}+\dfrac{7}{8}\)

\(=\dfrac{40}{48}+\dfrac{42}{48}\)

\(=\dfrac{41}{24}\)

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\(\dfrac{5}{8}-\dfrac{2}{5}\)

\(=\dfrac{25}{40}-\dfrac{16}{40}\)

\(=\dfrac{9}{40}\)

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\(\dfrac{9}{10}.\dfrac{5}{6}\)

\(=\dfrac{9.5}{10.6}\)

\(=\dfrac{3}{4}\)

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\(\dfrac{6}{5}:\dfrac{3}{7}\)

\(=\dfrac{6}{5}.\dfrac{7}{3}\)

\(=\dfrac{6.7}{5.3}\)

\(=\dfrac{14}{5}\)

Answer 2

5/6 + 7/8 = 40/48 + 42/48 = 40+42/48 = 82/48

5/8 - 2/5 = 25/40 - 16/40 = 25-16/40 = 9/40

9/10 x 5/6 = 9x5/10x6 = 45/60

6/5 : 3/7 = 6/5 x 7/3 = 6x7/5x3 = 42/15