a: =2-1/6=11/6
b: =24/36-9/36+8/36=23/36
c: =5/2+1/2=6/2=3
\(\dfrac{1}{2}:\dfrac{1}{4}-\dfrac{1}{6}\)
\(=2-\dfrac{1}{6}\)
\(=\dfrac{11}{6}\)
\(\dfrac{2}{3}-\dfrac{1}{4}+\dfrac{2}{9}\)
\(=\dfrac{24}{36}-\dfrac{9}{36}+\dfrac{8}{36}\)
\(=\dfrac{23}{36}\)
\(\dfrac{5}{2}+\dfrac{1}{3}\times\dfrac{3}{2}\)
\(=\dfrac{5}{2}+\dfrac{1}{2}\)
\(=3\)
`1/2 : 1/4 - 1/6= 1/2 xx 4 - 1/6 = 4/2 - 1/6 = 2-1/6=12/6-1/6=(12-1)/6=11/6`
`2/3 - 1/4 + 2/9=24/36 - 9/36 + 8/36 = (24-9+8)/36= 23/36`
`5/2 + 1/3 xx 3/2=5/2 + 1/2 = 6/2=3`
\(a,=\dfrac{1}{2}.\dfrac{4}{2}-\dfrac{1}{6}=\dfrac{4}{2}-\dfrac{1}{6}=\dfrac{4.3-1}{6}=\dfrac{12-1}{6}=\dfrac{11}{6}\\ b,=\dfrac{2.4-3}{12}+\dfrac{2}{9}=\dfrac{5}{12}+\dfrac{2}{9}=\dfrac{5.9+2.12}{108}=\dfrac{23}{36}\\ c,=\dfrac{5}{2}+\dfrac{1.3}{3.2}=\dfrac{5}{2}+\dfrac{1}{2}=\dfrac{5+1}{2}=\dfrac{6}{2}=3\)
a: =2-1/6=11/6
b: =24/36-9/36+8/36=23/36
c: =5/2+1/2=6/2=3
