@ Phạm Khánh Chi Copy phải ghi Tk nhé!

Tk = Tham khảo

@ Phạm Khánh Chi Copy phải ghi Tk nhé!

Tk = Tham khảo

\(24:6+36:6\)

\(=\left(24+36\right):6\)

\(=60:6\)

\(=10\)

\(\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}\)

\(=\dfrac{3}{6}+\dfrac{2}{6}+\dfrac{1}{6}\)

\(=\dfrac{3+2+1}{6}\)

\(=\dfrac{6}{6}\)

\(=1\)

\(3-\dfrac{16}{11}\)

\(=\dfrac{33}{11}-\dfrac{16}{11}\)

\(=\dfrac{17}{11}\)

_______________________________________________________

\(\dfrac{9}{8}-1\)

\(=\dfrac{9}{8}-\dfrac{8}{8}\)

\(=\dfrac{1}{8}\)

\(\dfrac{19}{5}-\dfrac{3}{15}\)

\(=\dfrac{19}{5}-\dfrac{1}{5}\)

\(=\dfrac{19-1}{5}\)

\(=\dfrac{18}{5}\)

\(\dfrac{4}{18}-\dfrac{1}{9}\)

\(=\dfrac{2}{9}-\dfrac{1}{9}\)

\(=\dfrac{2-1}{9}\)

\(=\dfrac{1}{9}\)

\(\dfrac{4}{18}-\dfrac{1}{9}\)

\(=\dfrac{4}{18}-\dfrac{2}{18}\)

\(=\dfrac{4-2}{18}\)

\(=\dfrac{2}{18}\)

\(=\dfrac{1}{9}\)

\(\dfrac{8}{3}+\dfrac{10}{7}\)

\(=\dfrac{56}{21}+\dfrac{30}{21}\)

\(=\dfrac{56+30}{21}\)

\(=\dfrac{86}{21}\)

\(\dfrac{4}{5}+\dfrac{3}{4}\)

\(=\dfrac{16}{20}+\dfrac{15}{20}\)

\(=\dfrac{16+15}{20}\)

\(=\dfrac{31}{20}\)