Question

Tính: a ) \(-3\frac{3}{4}+\frac{-10}{25}+\frac{-6}{12}\)

b) \(-0,6-\frac{-4}{9}-\frac{16}{15}\)

c ) \(\frac{7}{12}-\left(-\frac{1}{15}\right)-\frac{5}{6}+\frac{2}{3}+\left(-\frac{1}{5}\right)\)

Answer 1

Tính:

a) \(-3\frac{3}{4}+\left(-\frac{10}{25}\right)+\left(-\frac{6}{12}\right)\)

\(=\left(-\frac{15}{4}\right)+\left(-\frac{10}{25}\right)+\left(-\frac{6}{12}\right)\)

\(=\left(-\frac{83}{20}\right)+\left(-\frac{6}{12}\right)\)

\(=-\frac{93}{20}.\)

b) \(-0,6-\left(-\frac{4}{9}\right)-\frac{16}{15}\)

\(=\left(-\frac{3}{5}\right)-\left(-\frac{4}{9}\right)-\frac{16}{15}\)

\(=\left(-\frac{7}{45}\right)-\frac{16}{15}\)

\(=-\frac{11}{9}.\)

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