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\(3+\frac{2}{5}-\frac{3}{4}\times\frac{4}{5}\)
\(=3+\frac{2}{5}+\frac{3}{5}\)
\(=3+1\)
\(=4\)
Câu 1\(\frac{9}{8}.\frac{9}{3}=\frac{81}{24}\)
Câu 2 \(\frac{19}{5}+\frac{9}{5}=\frac{28}{5}\)
Câu 3 \(\frac{31}{7}:\frac{22}{5}=\frac{31.5}{7.22}=\frac{155}{154}\)
Câu 4 \(\frac{12}{1}-\frac{31}{5}=\frac{60}{5}-\frac{31}{5}=\frac{29}{5}\)
\(3+\frac{2}{5}-\frac{3}{4}\)X \(\frac{4}{5}\)
\(=\frac{3}{1}+\frac{2}{5}-\frac{3}{5}\)
\(=\frac{17}{5}-\frac{3}{5}\)
\(=\frac{14}{5}\)
\(3+\frac{2}{5}-\frac{3}{4}\times\frac{4}{5}\)
\(=3+\frac{2}{5}-\frac{3}{5}\)
\(=3+\frac{-1}{5}\)
\(=\frac{15}{5}+\frac{-1}{5}\)
\(=\frac{14}{5}\)
\(\dfrac{3}{4}\times\dfrac{8}{5}:1\dfrac{1}{6}\)
=\(\dfrac{6}{5}:\) \(\dfrac{7}{6}\)
=\(\dfrac{6}{5}\times\dfrac{6}{7}=\dfrac{36}{35}\)
2\(\dfrac{1}{3}\) x 1\(\dfrac{1}{4}\) -\(\dfrac{7}{5}\)
\(\dfrac{7}{3}\times\dfrac{5}{4}-\) \(\dfrac{7}{5}\)
\(\dfrac{35}{12}-\dfrac{7}{5}\)
\(\dfrac{175}{60}-\dfrac{84}{60}=\dfrac{91}{60}\)
4\(\dfrac{2}{3}+1\dfrac{1}{4} +2\dfrac{1}{3}+2\dfrac{3}{7}\)
(4 +2) + \(\left(\dfrac{2}{3}+\dfrac{1}{3}\right)\) +1\(\dfrac{1}{4}\) + \(2\dfrac{3}{7}\)
6 + 1 + \(\dfrac{5}{4}\) + \(\dfrac{17}{7}\)
7 + \(\dfrac{103}{28}\)
\(\dfrac{299}{28}\)
đưa hết hỗn số về dạng phân số rồi quy đồng bình thường ạ !
Hoàng_Linh_Nga làm đc thì làm nhé.
Giải:
\(2\frac{1}{6}+3\frac{2}{3}\)
\(=\frac{13}{12}+\frac{11}{9}\)
\(=\frac{249}{108}\)
\(4\frac{3}{4}-3\frac{5}{6}\)
\(=\frac{19}{16}-\frac{23}{18}\)
\(=\frac{342}{288}-\frac{368}{288}\)
\(=\frac{-26}{288}\)xem lại đề đi nhé
\(9\frac{1}{6}\times4\frac{2}{3}\)
\(=\frac{55}{18}\times\frac{15}{12}\)
\(=\frac{825}{216}\)
\(2\frac{5}{7}:\frac{14}{5}\)
\(=\frac{19}{7}:\frac{14}{5}\)
\(=\frac{95}{98}\)
\(\frac{23}{12}\)
\(\frac{314}{105}\)
\(\frac{59}{60}\)
\(\frac{199}{90}\)
\(\frac{1}{18}\)
\(\frac{13}{36}\)
\(\frac{4}{221}\)
\(\frac{4}{85}\)
\(2\frac{1}{2}\times4\frac{2}{5}=\frac{5}{2}\times\frac{22}{5}=\frac{110}{10}=11\)
\(3\frac{5}{7}+1\frac{6}{7}=\frac{26}{7}+\frac{13}{7}=\frac{39}{7}\)
\(5\div1\frac{3}{5}=5\div\frac{8}{5}=5\times\frac{5}{8}=\frac{25}{8}\)
\(4\frac{1}{9}-2\frac{2}{3}=\frac{37}{9}-\frac{8}{3}=\frac{37}{9}-\frac{24}{9}=\frac{13}{9}\)
#Học tốt!!!
~NTTH~
\(2\frac{1}{2}×4\frac{2}{5}=\frac{5}{2}×\frac{22}{5}=11\)
\(3\frac{7}{5}+1\frac{6}{7}=\frac{22}{5}+\frac{13}{7}=\frac{219}{35}\)
\(5:1\frac{3}{5}=5:\frac{8}{5}=\frac{25}{8}\)
\(4\frac{1}{9}-2\frac{2}{3}=\frac{37}{9}-\frac{8}{3}=\frac{13}{9}\)
A)\(\frac{4}{3}\times\frac{9}{5}-\frac{6}{5}+3\)
\(=\frac{12}{5}-\frac{6}{5}+3\)
\(=\frac{6}{5}+3\)
\(=3\frac{6}{5}\)
B) \(\frac{5}{3}\div4\div\frac{3}{7}\)
\(=\frac{5}{12}\div\frac{3}{7}\)
\(=\frac{35}{36}\)
C) \(1\frac{3}{4}\div2\frac{3}{5}\)
\(=\frac{7}{4}\div\frac{13}{5}\)
\(=\frac{35}{52}\)
CHÚC BẠN HỌC TỐT!!
\(\frac{4}{3}.\frac{9}{5}-\frac{6}{5}+3=\frac{21}{5}\)
\(\frac{5}{3}:4:\frac{3}{7}=\frac{35}{36}\)
\(1\frac{3}{4}:2\frac{3}{5}=\frac{35}{52}\)