Question

1.Tính tổng a)5/6 + 1/2. b)7/8 + 1/4. c)5/9 + 3/7 Bài 2: Điền dấu >,

Answer 1

a: 5/6+1/2=5/6+3/6=8/6=4/3

b: 7/8+1/4=7/8+2/8=9/8

c: 5/9+3/7=35/63+27/63=62/63

Answer 2

\(a,\dfrac{5}{6}+\dfrac{1}{2}=\dfrac{4}{3}\\ b,\dfrac{7}{8}+\dfrac{1}{4}=\dfrac{9}{8}\\ c,\dfrac{5}{9}+\dfrac{3}{7}=\dfrac{62}{63}\)

Answer 3

\(a,\dfrac{5}{6}+\dfrac{1\times3}{2\times3}=\dfrac{5}{6}+\dfrac{3}{6}=\dfrac{8}{6}=\dfrac{4}{3}\\ b,\dfrac{7}{8}+\dfrac{1\times2}{4\times2}=\dfrac{7}{8}+\dfrac{2}{8}=\dfrac{9}{8}\\ c,\dfrac{5\times7}{9\times7}+\dfrac{3\times9}{7\times9}=\dfrac{35}{63}+\dfrac{27}{63}=\dfrac{62}{63}\)