Question

Tính

1, 1/12- 2/3

2, 1/6- 1/36

3,-1/6- 2/5

4, 3/4- 1/20

Answer 1

\(1,=\dfrac{1}{12}-\dfrac{4}{12}=\dfrac{3}{12}\\ 2,=\dfrac{6}{36}-\dfrac{1}{36}=\dfrac{5}{36}\\ 3,\dfrac{-1}{6}-\dfrac{2}{5}=\dfrac{-5}{30}-\dfrac{12}{30}=\dfrac{-17}{30}\\ 4,=\dfrac{15}{20}-\dfrac{1}{20}=\dfrac{14}{20}\)

Answer 2

1,=112−412=3122,=636−136=5363,−16−25=−530−1230=−17304,=1520−120=1420