Question

tính 

a, 3/4 + 1/5   b,1/36 + 5/12  c, 1/6 + 3/8   d, 1/8 + 7/10    e, 1/8 + 5/6   g,2/3  + 2/7

Answer 1

\(a,\frac{3}{4}+\frac{1}{5}=\frac{15}{20}+\frac{4}{20}=\frac{19}{20}\)

\(b,\frac{1}{36}+\frac{5}{12}=\frac{1}{36}+\frac{15}{36}=\frac{16}{36}=\frac{4}{9}\)

\(c,\frac{1}{6}+\frac{3}{8}=\frac{8}{48}+\frac{18}{48}=\frac{26}{48}=\frac{13}{24}\)

\(d,\frac{1}{8}+\frac{7}{10}=\frac{10}{80}+\frac{56}{80}=\frac{66}{80}=\frac{33}{40}\)

\(e,\frac{1}{8}+\frac{5}{6}=\frac{6}{48}+\frac{40}{48}=\frac{46}{48}=\frac{23}{24}\)

\(g,\frac{2}{3}+\frac{2}{7}=\frac{14}{21}+\frac{6}{21}=\frac{20}{21}\)

Answer 2

như bạn roronoa vừa làm

Answer 3

a) \(\frac{3}{4}+\frac{1}{5}=\frac{15}{20}+\frac{4}{20}=\frac{19}{20}\)

b) \(\frac{1}{36}+\frac{5}{12}=\frac{1}{36}+\frac{15}{36}=\frac{16}{36}=\frac{4}{9}\)

c) \(\frac{1}{6}+\frac{3}{8}=\frac{4}{24}+\frac{9}{24}=\frac{13}{24}\)

d) \(\frac{1}{8}+\frac{7}{10}=\frac{10}{80}+\frac{56}{80}=\frac{66}{80}=\frac{33}{40}\)

e) \(\frac{1}{8}+\frac{5}{6}=\frac{3}{24}+\frac{20}{24}=\frac{23}{24}\)

g) \(\frac{2}{3}+\frac{2}{7}=\frac{14}{21}+\frac{6}{21}=\frac{20}{21}\)