Đề bài

Tính: a)     \(\frac{5}{16}- \frac{5}{24}\) b)    \(\frac{2}{11}+(\frac{-5}{11}- \frac{9}{11})\) c)     \(\frac{1}{10}- (\frac{5}{12}- \frac{1}{15})\)

Lời giải chi tiết

a)     \(\frac{5}{16}- \frac{5}{24}\\=\frac{15}{48}- \frac{10}{48}\\=\frac{15-10}{48}\\=\frac{5}{48}\) b)    \(\frac{2}{11}+(\frac{-5}{11}- \frac{9}{11})\\ = \frac{2}{11}+\frac{-5}{11}- \frac{9}{11}\\= \frac{2+(-5)-9}{11}\\=\frac{-12}{11}\) c)     \(\frac{1}{10}- (\frac{5}{12}- \frac{1}{15})\\=\frac{1}{10}- \frac{5}{12}+ \frac{1}{15}\\= \frac{6}{60}-\frac{25}{60}+\frac{4}{60}\\=\frac{6-25+4}{60}\\=\frac{-15}{60}\\=\frac{-1}{4}\)