Question

Tinh

a) 8/5 + 3/10

b)2/3 +  3/4 + 1/6

c)5/6 - 2/9

 

Answer 1

\(a,\frac{8}{5}+\frac{3}{10}=\frac{16}{10}+\frac{3}{10}=\frac{19}{10}\)

\(b,\frac{2}{3}+\frac{3}{4}+\frac{1}{6}=\frac{8}{12}+\frac{9}{12}+\frac{2}{12}\)\(=\frac{19}{12}\)

\(c,\frac{5}{6}-\frac{2}{9}=\frac{15}{18}-\frac{4}{18}=\frac{11}{18}\)

Answer 2

                           a)19/10

                           b)19/12

                           c)11/18

Answer 3

A)8/5 + 3/10 = 16/10 + 6/10 = 22/10

B) 2/3 + 3/4 + 1/6 = 8/12 + 9/12 + 2/12 = 19/12

C)5/6 - 2/9 = 15/18 - 4/18 = 11/18

K mk nha

Answer 4

a) \(\frac{8}{5}+\frac{3}{10}=\frac{19}{10}\)

b) \(\frac{2}{3}+\frac{3}{4}+\frac{1}{6}=\frac{19}{12}\)

c) \(\frac{5}{6}-\frac{2}{9}=\frac{11}{18}\)

(k cho tớ với nhá!)

Answer 5

a) \(\frac{8}{5}+\frac{3}{10}\)

\(\frac{8}{5}=\frac{8\times2}{5\times2}=\frac{16}{10}\)

\(\frac{8}{5}+\frac{3}{10}=\frac{16}{10}+\frac{3}{10}=\frac{16+3}{10}=\frac{19}{10}\)

b) \(\frac{2}{3}+\frac{3}{4}+\frac{1}{6}\)

\(\frac{2}{3}=\frac{2\times4}{3\times4}=\frac{8}{12}\)\(\frac{3}{4}=\frac{3\times3}{4\times3}=\frac{9}{12}\)\(\frac{1}{6}=\frac{1\times2}{6\times2}=\frac{2}{12}\)

\(\frac{2}{3}+\frac{3}{4}+\frac{1}{6}=\frac{8}{12}+\frac{9}{12}+\frac{2}{12}=\frac{8+9+2}{12}=\frac{19}{12}\)

c)\(\frac{5}{6}-\frac{2}{9}\)

\(\frac{5}{6}=\frac{5\times3}{6\times3}=\frac{15}{18}\)\(\frac{2}{9}=\frac{2\times2}{9\times2}=\frac{4}{18}\)

\(\frac{5}{6}-\frac{2}{9}=\frac{15}{18}-\frac{4}{18}=\frac{15-4}{18}=\frac{11}{18}\)