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a) \(3\dfrac{1}{2}+4\dfrac{5}{7}-5\dfrac{5}{14}=\dfrac{7}{2}+\dfrac{33}{7}-\dfrac{75}{14}=\dfrac{49}{14}+\dfrac{66}{14}-\dfrac{75}{14}=\dfrac{40}{14}=\dfrac{20}{7}\)
b) \(3\dfrac{5}{6}+2\dfrac{1}{6}x6=\dfrac{23}{6}+\dfrac{13}{6}x6=\dfrac{23}{6}+\dfrac{78}{6}=\dfrac{101}{6}\)
a: \(=\dfrac{2}{5}+\dfrac{3}{5}\cdot\dfrac{10}{3}\cdot\dfrac{1}{2}=\dfrac{2}{5}+\dfrac{10}{5}\cdot\dfrac{1}{2}=\dfrac{2}{5}+1=\dfrac{7}{5}\)
a) \(\dfrac{5}{6}+\dfrac{3}{2}\cdot\dfrac{4}{5}\)
\(=\dfrac{5}{6}+\dfrac{3\cdot2\cdot2}{2\cdot5}\)
\(=\dfrac{5}{6}+\dfrac{6}{5}\)
\(=\dfrac{61}{30}\)
b) \(\dfrac{6}{7}:\dfrac{9}{14}-1\)
\(=\dfrac{6}{7}\cdot\dfrac{14}{9}-1\)
\(=\dfrac{2\cdot3\cdot7\cdot2}{7\cdot3\cdot3}-1\)
\(=\dfrac{4}{3}-1\)
\(=\dfrac{1}{3}\)
a) \(\dfrac{5}{6}+\dfrac{3}{2}.\dfrac{4}{5}=\dfrac{5}{6}+\dfrac{6}{5}=\dfrac{61}{30}\)
b) \(\dfrac{6}{7}:\dfrac{9}{14}-1=\dfrac{4}{3}-1=\dfrac{1}{3}\)
\(\frac{5}{11}+\frac{1}{14}+\frac{2}{5}+\frac{6}{11}+\frac{3}{4}+\frac{6}{25}+\frac{9}{25}\)
\(=\frac{5}{11}+\frac{6}{11}+\frac{1}{14}+\frac{3}{4}+\frac{2}{5}+\frac{6}{25}+\frac{9}{25}\)
\(=1+\frac{23}{28}+1\)
\(=\frac{79}{28}\)
Bạn có thể xem ở đây : Tại đây
=1/14 +1/4+(2/5+6/25+9/25)+(6/11+5/11)
=4/64+16/64+1+1
=20/64+1+1
=5/16+1+1
=2 và 5/16
Cho mình sửa lại đề tí nhé bạn , nếu có gì sai liên hệ với mình !
\(\frac{5}{11}+\frac{1}{4}+\frac{2}{5}+\frac{6}{11}+\frac{3}{4}+\frac{6}{25}+\frac{9}{25}\)
\(=\frac{5}{11}+\frac{6}{11}+\frac{1}{4}+\frac{3}{4}+\frac{2}{5}+\frac{6}{25}+\frac{9}{25}\)
\(=1+1+1\)
\(=3\)
\(\frac{14}{15}-\frac{5}{6}=\frac{1}{10}\)
\(\frac{9}{7}-\frac{9}{14}=\frac{9}{14}\)
\(2-\frac{3}{4}=\frac{5}{4}\)
\(\frac{14}{6}+\frac{1}{3}+\frac{14}{14}+\frac{14}{9}+\frac{7}{15}+\frac{6}{4}\)
\(=\frac{14}{6}+\frac{1}{3}+\frac{14}{9}+\frac{7}{15}+\frac{14}{14}+\frac{6}{4}\)
\(=\frac{42+6+28}{18}+\frac{7}{15}+\frac{2}{2}+\frac{3}{2}\)
\(=\frac{76}{18}+\frac{7}{15}+\frac{5}{2}\)
\(=\frac{76}{18}+\frac{5}{2}+\frac{7}{15}\)
\(=\frac{76+45}{18}+\frac{7}{15}\)
\(=\frac{121}{18}+\frac{7}{15}\)
\(=\frac{605+42}{90}\)
\(=\frac{647}{90}\)
\(\frac{14}{6}+\frac{1}{3}+\frac{14}{14}+\frac{14}{9}+\frac{7}{15}+\frac{6}{4}\)
\(=(\frac{7}{3}+\frac{1}{3})+1+(\frac{14}{9}+\frac{7}{15})+\frac{3}{2}\)
\(=\frac{8}{3}+1+\frac{91}{45}+\frac{3}{2}\)
\(=2+\frac{2}{3}+1+2+\frac{1}{45}+1+\frac{1}{2}\)
\(=\left(\frac{2}{3}+\frac{1}{45}+\frac{1}{2}\right)+\left(2+1+2+1\right)\)
\(=1+\frac{17}{90}+6\)
\(=7+\frac{17}{90}\)
\(=7\frac{17}{90}\)
\(\dfrac{4}{11}< \dfrac{6}{11}\)
\(\dfrac{6}{7}=\dfrac{12}{14}\)
\(\dfrac{15}{17}>\dfrac{10}{17}\)
\(\dfrac{2}{3}< \dfrac{3}{4}\)
411<611411<611
67=121467=1214
1517>10171517>1017
23<34
hoc tot nhe
\(\frac{6}{14}\)
chào mai phương