\(\dfrac{13}{6}+\dfrac{6}{1}=\dfrac{13}{6}+\dfrac{36}{6}=\dfrac{49}{6}\)
\(\dfrac{13}{6}+\dfrac{6}{1}=\dfrac{13}{6}+\dfrac{36}{6}=\dfrac{49}{6}\)
\(\dfrac{13}{6}+\dfrac{6}{1}=\dfrac{13}{6}+\dfrac{36}{6}=\dfrac{49}{6}\)
\(\dfrac{13}{6}+\dfrac{6}{1}=\dfrac{13}{6}+\dfrac{36}{6}=\dfrac{49}{6}\)
\(\dfrac{13}{6}+\dfrac{6}{1}=\dfrac{13}{6}+\dfrac{36}{6}=\dfrac{49}{6}\)
\(\dfrac{13}{6}+\dfrac{6}{1}=\dfrac{13}{6}+\dfrac{36}{6}=\dfrac{49}{6}\)
\(\dfrac{19}{13}\) + \(\dfrac{14}{6}\) + \(\dfrac{1}{9}\) + \(\dfrac{4}{6}\) + \(\dfrac{7}{13}\) + \(\dfrac{17}{9}\)
Tính theo cách thuận tiện :
\(\dfrac{13}{7}+\dfrac{5}{6}+\dfrac{2}{7}+\dfrac{7}{6}\) = ?
\(\dfrac{1}{2}x\dfrac{5}{6}+\dfrac{1}{2}x\dfrac{11}{6}=?\)
1.Số thích hợp để điền vào ô trống \(\dfrac{1}{2}=\dfrac{4}{ }\)
A.8 B.5 C.6 D.7
2.Trong các phân số sau \(\dfrac{6}{6},\dfrac{18}{7},\dfrac{9}{13},\dfrac{11}{2}\) phân số bé hơn 1 là:
A.\(\dfrac{6}{6}\) B.\(\dfrac{18}{7}\) C.\(\dfrac{9}{13}\) D.\(\dfrac{11}{2}\)
3.Một mảnh đất trồng hoa HBH có đọ dài đáy là 40dm ,chiều cao là 25dm.Diện tích của mảnh đất đó là:
A.65 \(dm^2\) B.15 \(dm^2\) C.1 000 \(dm^2\) D.500 \(dm^2\)
tính bằng cách thuận tiện nhất a, \(\dfrac{2}{9}\)+\(\dfrac{1}{6}\)+\(\dfrac{3}{5}\) b, \(\dfrac{9}{13}\)+\(\dfrac{4}{13}\)+\(\dfrac{2}{3}\)
\(\dfrac{2}{13}x12=\)
\(1-\dfrac{5}{6}=\)
\(\dfrac{5}{7}+\dfrac{1}{3}=\)
Ghi rõ các bước
Tính nhanh:
\(\dfrac{12}{13}+\dfrac{2}{7}+\dfrac{8}{13}+\dfrac{6}{13}+\dfrac{5}{7}\)
a.\(\dfrac{x}{y}\) x \(\dfrac{3}{4}\) = \(\dfrac{5}{6}\) + \(\dfrac{1}{3}\)
b.\(\dfrac{7}{9}:\dfrac{x}{y}=\dfrac{10}{7}-\dfrac{13}{14}\)
6. ÉT O ÉT
\(\dfrac{125}{90}=\dfrac{25}{...}\) / \(\dfrac{84}{91}=\dfrac{...}{13}\) / \(\dfrac{75}{...}=\dfrac{25}{15}=\dfrac{...}{3}\)
\(\dfrac{6}{7}=\dfrac{...}{21}=\dfrac{54}{...}=\dfrac{...}{126}\)
Kết quả của phép tính \(\dfrac{1}{5}+\dfrac{1}{6}\)bằng?
A. \(\dfrac{13}{30}\)
B. \(\dfrac{17}{30}\)
C. \(\dfrac{37}{30}\)
D. \(\dfrac{11}{30}\)