Question

thực hiện các phép tính sau 

a) 3/2-5/6+1/12                b) (2/3-1/2)^2:15/6+(51/15)^0
mọi người giúp mình vs ạ 

Answer 1

a)

\(\dfrac{3}{2}-\dfrac{5}{6}+\dfrac{1}{12}\)

\(=\dfrac{9}{6}-\dfrac{5}{6}+\dfrac{1}{12}\)

\(=\dfrac{2}{3}+\dfrac{1}{12}\)

\(=\dfrac{8}{12}+\dfrac{1}{12}\)

\(=\dfrac{3}{4}\)

b)

\(\left(\dfrac{2}{3}-\dfrac{1}{2}\right)^2:\dfrac{15}{6}+\left(\dfrac{51}{15}\right)^0\)

\(=\left(\dfrac{4}{6}-\dfrac{3}{6}\right)^2:\dfrac{15}{6}+1\)

\(=\left(\dfrac{1}{6}\right)^2:\dfrac{15}{6}+1\)

\(=\dfrac{1}{36}.\dfrac{6}{15}+1\)

\(=\dfrac{1}{90}+1\)

\(=\dfrac{91}{90}\)