Question

Tính:

A) 7/15+4/5=................... B) 5/8+2=....................

C) 2/3-3/8=................. D) 4-2/5=...................

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Answer 1

a)\(\frac{19}{15}\)

b) 2,625

c)\(\frac{7}{24}\)

d) 3,6

Answer 2

a) \(\frac{7}{15}+\frac{4}{5}=\frac{7}{15}+\frac{12}{15}=\frac{19}{15}\)

b) \(\frac{5}{8}+2=\frac{5}{8}+\frac{2}{1}=\frac{5}{8}+\frac{16}{8}=\frac{21}{8}\)

c) \(\frac{2}{3}-\frac{3}{8}=\frac{16}{24}-\frac{9}{24}=\frac{7}{24}\)

d) \(4-\frac{2}{5}=\frac{4}{1}-\frac{2}{5}=\frac{20}{5}-\frac{2}{5}=\frac{18}{5}\)

Answer 3

A) \(\frac{7}{15}+\frac{4}{5}=\frac{7}{15}+\frac{12}{15}=\frac{19}{15}\)                              B)\(\frac{5}{8}+2=\frac{5}{8}+\frac{16}{8}=\frac{21}{8}\)

C) \(\frac{2}{3}-\frac{3}{8}=\frac{16}{24}-\frac{9}{24}=\frac{7}{24}\)                            D)\(4-\frac{2}{5}=\frac{20}{5}-\frac{2}{5}=\frac{18}{5}\)

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