\(=\dfrac{4}{9}+\dfrac{4}{9}=\dfrac{8}{9}\)
Tham khảo :
\(\dfrac{4}{9} +\dfrac{16}{36}=\dfrac{8}{9}\)
\(=\dfrac{4}{9}+\dfrac{4}{9}=\dfrac{8}{9}\)
Tham khảo :
\(\dfrac{4}{9} +\dfrac{16}{36}=\dfrac{8}{9}\)
\(x+\dfrac{4}{9}+\dfrac{8}{18}+\dfrac{12}{27}+\dfrac{16}{36}=\dfrac{16}{9}\)
giúp mk với ạ
khoanh vào phân số bằng \(\dfrac{4}{9}\) \(\dfrac{12}{18}\), \(\dfrac{6}{10}\), \(\dfrac{16}{27}\), \(\dfrac{24}{54}\), \(\dfrac{20}{36}\)
\(\dfrac{......}{9}=\dfrac{4}{36}\)
A, 1 b, 4 c, 9 d,36
\(a,\dfrac{9}{12}=\dfrac{3}{...}=\dfrac{...}{36}\\ b,\dfrac{4}{6}=\dfrac{10}{...}=\dfrac{...}{3}\)
Điền dấu > ; < hoặc = vào chỗ chấm cho thích hợp:
a) \(\dfrac{3}{4}.....\dfrac{4}{5}\) b) \(\dfrac{11}{12}.....\dfrac{7}{8}\) c) \(\dfrac{5}{7}+\dfrac{3}{5}.....\dfrac{6}{7}:\dfrac{5}{8}\) d) \(\dfrac{9}{16}-\dfrac{5}{9}.....\dfrac{1}{16}x\dfrac{1}{9}\)
Chứng minh : \(\dfrac{9}{22}\) < \(\dfrac{1}{4}\) + \(\dfrac{1}{9}\)+ \(\dfrac{1}{16}\)+...\(\dfrac{1}{100}\)<\(\dfrac{9}{10}\)
bài 2:
\(\dfrac{11}{12}\)-\(\dfrac{5}{12}\)=...... \(\dfrac{25}{24}\)-\(\dfrac{16}{24}\)=...... \(\dfrac{27}{36}\)-\(\dfrac{15}{36}\)=.......
\(\)a) \(\dfrac{3}{5}+\dfrac{11}{20}\) b) \(\dfrac{5}{8}-\dfrac{4}{9}\) c) \(\dfrac{9}{16}\) x \(\dfrac{4}{3}\)
d) \(\dfrac{4}{7}:\dfrac{8}{11}\) e) \(\dfrac{3}{5}+\dfrac{4}{5}:\dfrac{2}{5}\)
so sánh với 1 :
\(\dfrac{1}{4444};\dfrac{3}{7};\dfrac{9}{5};\dfrac{7}{3};\dfrac{14}{15};\dfrac{16}{16};\dfrac{14}{11}\)
↑ \(\dfrac{1}{4}\) :>