7/3/8 - 4/5/8 = 59/8 - 37/8 = 12

2/1/4 +5/1/4 = 9/4 + 21/4 = 15/2

3/1/4 x 2/3/5 = 13/4 x 13/5 =11/20

\(7\frac{3}{8}-4\frac{5}{8}=\frac{59}{8}-\frac{37}{8}=\frac{22}{8}\)\(=\)\(2,75\)

\(2\frac{1}{4}+5\frac{1}{4}=\frac{9}{4}+\frac{21}{4}=\frac{30}{4}=7,5\)

\(3\frac{1}{4}\times2\frac{3}{5}=\frac{13}{4}\times\frac{13}{5}=\frac{169}{20}=8,45\)

#Minyun

4 VÀ 2/3 =14/3

7 VÀ 3/11=80/11

2 VÀ 3/4=11/4

TA CÓ :14/3+11/4 nhân 80/11=74/3

TICK NHA!!!

6/5 + 1/4 bằng bao nhiêu

\(6\frac{1}{2}-3\frac{1}{3}=\frac{13}{2}-\frac{10}{3}=\frac{39}{6}-\frac{20}{6}=\frac{19}{6}=3\frac{1}{6}\)

\(2\frac{1}{2}\cdot3\frac{1}{4}=\frac{5}{2}\cdot\frac{13}{4}=\frac{65}{8}=8\frac{1}{8}\)

\(8\frac{2}{5}:4\frac{2}{7}=\frac{42}{5}:\frac{30}{7}=\frac{42}{5}\cdot\frac{7}{30}=\frac{42\cdot7}{5\cdot30}=\frac{7\cdot7}{5\cdot5}=\frac{49}{25}=1\frac{24}{25}\)

thành phân số chứ ko phải = hỗn số

a) \(1\frac{1}{2}+1\frac{1}{3}=\frac{3}{2}+\frac{4}{3}=\frac{9}{6}+\frac{8}{6}=\frac{17}{6}\)

b) \(2\frac{2}{3}-1\frac{4}{7}=\frac{8}{3}-\frac{11}{7}=\frac{56}{21}-\frac{33}{21}=\frac{23}{21}\)

c)\(2\frac{2}{3}\times5\frac{1}{4}=\frac{8}{3}\times\frac{21}{4}=\frac{168}{12}=14\)

d) \(3\frac{1}{2}:2\frac{1}{4}=\frac{7}{2}:\frac{9}{4}=\frac{28}{18}=\frac{19}{4}\)

a) ​\(1\frac{1}{2}+1\frac{1}{3}=\frac{3}{2}+\frac{4}{3}=\frac{9}{6}+\frac{8}{6}=\frac{17}{6}\)

b) \(2\frac{2}{3}-1\frac{4}{7}=\frac{8}{3}-\frac{11}{7}=\frac{56}{21}-\frac{33}{21}=\frac{23}{21}\)

c) \(2\frac{2}{3}\cdot5\frac{1}{4}=\frac{8}{3}\cdot\frac{21}{4}=14\)

d) \(3\frac{1}{2}:2\frac{1}{4}=\frac{7}{2}:\frac{9}{4}=\frac{7}{2}.\frac{4}{9}=\frac{14}{9}\)

3 2 5   x   2 1 7 = 17 5   x   15 7 = 51 7

2 1 3   x   5 1 4 = 7 3   x   21 4 = 49 4

\(4\frac{2}{3}+2\frac{3}{4}.7\frac{3}{11}=\frac{14}{3}+\frac{11}{4}.\frac{80}{11}=\frac{14}{3}+20=\frac{14}{3}+\frac{60}{3}=\frac{74}{3}\)

\(4\frac{2}{3}+2\frac{3}{4}\times7\frac{3}{11}\)

\(=\frac{14}{3}+\frac{11}{4}\times\frac{80}{11}\)

\(=\frac{14}{3}+\frac{11\times80}{4\times11}\)

\(=\frac{14}{3}+20\)

\(=\frac{14}{3}+\frac{60}{3}\)

\(=\frac{74}{3}\)