Question

Bài 1: Tính

a)\(\frac{1}{3}+\frac{3}{8}-\frac{7}{12}\)

b) \(\frac{3}{14}+\frac{5}{8}-\frac{1}{2}\)

c) \(\frac{1}{4}-\frac{2}{3}-\frac{11}{18}\)

d) \(\frac{1}{4}+\frac{5}{12}-\frac{1}{13}-\frac{7}{8}\)

#giải hộ mk vs mk đng cần gấp

Answer 1

a) MC :24

\(\frac{1}{3}+\frac{3}{8}-\frac{7}{12}=\frac{1\times8+3\times3-7\times2}{24}=\frac{3}{24}=\frac{1}{8}\)

b)MC : 56

\(\frac{3}{14}+\frac{5}{8}-\frac{1}{2}=\frac{3\times4+5\times7-1\times28}{56}=\frac{19}{56}\)

c) MC: 36

\(\frac{1}{4}-\frac{2}{3}-\frac{11}{18}=\frac{1\times9-2\times12-11\times2}{36}=\frac{-37}{36}\)

d) MC: 312

\(\frac{1}{4}+\frac{5}{12}-\frac{1}{13}-\frac{7}{8}=\frac{1\times78+5\times26-1\times24-7\times39}{312}=\frac{-89}{312}\)