\(b,\dfrac{2}{8}+\dfrac{3}{8}+\dfrac{7}{8}=\dfrac{2+3+7}{8}=\dfrac{12}{8}=\dfrac{3}{2}\\ c,\dfrac{4}{5}+\dfrac{3}{8}+\dfrac{1}{4}=\dfrac{32}{40}+\dfrac{15}{40}+\dfrac{10}{40}=\dfrac{32+15+10}{40}=\dfrac{57}{40}\\ d,\dfrac{1}{2}+\dfrac{2}{3}+\dfrac{3}{5}=\dfrac{15}{30}+\dfrac{20}{30}+\dfrac{18}{30}=\dfrac{15+20+18}{30}=\dfrac{53}{30}\)
b)\(2/8+3/8+7/8=12/8=3/2\)
c)\(4/5+3/8+1/4=57/40\)
d)\(1/2+2/3+3/5=53/30\)
Chúc em học giỏi
\(b,\dfrac{2}{8}+\dfrac{3}{8}+\dfrac{7}{8}=\dfrac{2+3+7}{8}=\dfrac{12}{8}\)
\(c,\dfrac{4}{5}+\dfrac{3}{8}+\dfrac{1}{4}=\dfrac{32}{40}+\dfrac{15}{40}+\dfrac{10}{10}=\dfrac{32+15+10}{40}=\dfrac{57}{40}\)
\(d,\dfrac{1}{2}+\dfrac{2}{3}+\dfrac{3}{5}=\dfrac{15}{30}+\dfrac{20}{30}+\dfrac{18}{30}=\dfrac{15+20+18}{30}=\dfrac{53}{30}\)
b, 2/8 + 3/8 + 7/8 = 12/8 = 3/2
c, 4/5 + 3/8 + 1/4 = 32/40 + 15/40 + 10/40 = 57/40
d, 1/2 + 2/3 + 3/5 = 15/30 + 20/30 + 18/30 = 53/30
b)2/8+3/8+7/8=12/8=3/22/8+3/8+7/8=12/8=3/2
c)4/5+3/8+1/4=57/404/5+3/8+1/4=57/40
d)1/2+2/3+3/5=53/30
nha
