\(\frac{37}{6}=6\frac{1}{6}\)

\(\frac{12}{5}=2\frac{2}{5}\)

\(\frac{108}{9}=\frac{12}{1}\)

\(\frac{37}{6}=6\frac{1}{6}\);

\(\frac{12}{5}=2\frac{2}{5}\) ;

\(\frac{108}{9}=12\)

bài cuối ko phải là số thập phân nữa

ủng hộ nha

37/6 = 6/1/6

12/5=2/2/5

108/9=12

\(\dfrac{6}{7}+\dfrac{5}{8}=\dfrac{48}{56}+\dfrac{35}{56}=\dfrac{83}{56}\)

\(\dfrac{36}{12}-\dfrac{5}{3}=\dfrac{9}{3}-\dfrac{5}{3}=\dfrac{4}{3}\)

\(\dfrac{6}{7}+\dfrac{5}{8}=\dfrac{48}{56}+\dfrac{35}{56}=\dfrac{83}{56}\\\dfrac{36}{12}+\dfrac{5}{3}=\dfrac{36}{12}+\dfrac{20}{12} =\dfrac{56}{12}=\dfrac{14}{3}\)

6/7 + 5/8 = 48/56 + 35/56 = 83/56

36/12 - 5/3 = 36/12 - 20/12 = 16/12 = 4/3

a: \(=\dfrac{37}{4}+\dfrac{117}{16}+\dfrac{1}{4}=\dfrac{19}{2}+\dfrac{117}{16}=\dfrac{269}{16}\)

b: \(=1+\left(\dfrac{9}{10}+\dfrac{8}{10}\right):\dfrac{19}{6}=1+\dfrac{17}{10}\cdot\dfrac{6}{19}=\dfrac{146}{95}\)

c: \(=\dfrac{1}{4}-\dfrac{6}{4}+\dfrac{6}{5}=\dfrac{-5}{4}+\dfrac{6}{5}=\dfrac{-1}{20}\)

10/5=2

12/9=4/3

8/4=2

5/6 là PS tối giản

\(\frac{10}{5}=\frac{10:5}{5:5}=\frac{2}{1}\)

\(\frac{12}{9}=\frac{12:3}{9:3}=\frac{4}{3}\)

\(\frac{8}{4}=\frac{8:4}{4:4}=\frac{2}{1}\)

\(\frac{5}{6}\)giữ nguyên

\(\frac{10}{5}\)=\(\frac{10:5}{5:5}\)=\(\frac{2}{1}\)=\(2\)

\(\frac{12}{9}\)=\(\frac{12:3}{9:3}\)=\(\frac{4}{3}\)

\(\frac{8}{4}\)=\(\frac{8:4}{4:4}\)=\(\frac{2}{1}\)=\(2\)

\(\frac{5}{6}\)là phân số tối giản.

a: 

13/17=1-4/17

8/12=1-4/12

mà 4/17<4/12

nên 13/17>8/12=12/18

b: 16/51<17/51=1/3=30/90<31/90

12/18<13/17

16/51>31/90

a,A,C,D

b,C

a) Câu A;D

b) Câu C

các số có mẫu giống nhau thì cộng vào thôi !

\(2\dfrac{3}{4}=\dfrac{2\times4+3}{4}=\dfrac{11}{4}\\ 3\dfrac{4}{5}=\dfrac{3\times5+4}{5}=\dfrac{19}{5}\\ 4\dfrac{3}{5}=\dfrac{4\times5+3}{5}=\dfrac{23}{5}\\ 11\dfrac{12}{13}=\dfrac{11\times13+12}{13}=\dfrac{155}{13}\\ 12\dfrac{11}{13}=\dfrac{12\times13+11}{13}=\dfrac{167}{13}\\ 3\dfrac{3}{5}=\dfrac{3\times5+3}{5}=\dfrac{18}{5}\)

2\(\dfrac{3}{4}\)=\(\dfrac{11}{4}\)

3\(\dfrac{4}{5}\)=\(\dfrac{19}{5}\)

4\(\dfrac{3}{5}\)=\(\dfrac{23}{5}\)

11\(\dfrac{12}{13}\)=\(\dfrac{155}{13}\)

12\(\dfrac{11}{13}\)=\(\dfrac{167}{13}\)

3\(\dfrac{3}{5}\)=\(\dfrac{18}{5}\).

\(1\dfrac{1}{5}+1\dfrac{2}{4}=\dfrac{6}{5}+\dfrac{6}{4}=\dfrac{24}{20}+\dfrac{30}{20}=\dfrac{54}{40}\)

Cách chuyển hỗn số thành phân số :

\(1\dfrac{1}{5}=\dfrac{1x5+1}{5}=\dfrac{6}{5}\)

\(1\dfrac{2}{4}=\dfrac{1x4+2}{4}\dfrac{6}{4}\)

\(1\dfrac{1}{5}+1\dfrac{2}{4}=\dfrac{6}{5}+\dfrac{3}{2}=\dfrac{6\times2}{5\times2}+\dfrac{3\times5}{2\times5}=\dfrac{12}{10}+\dfrac{15}{10}=\dfrac{12+15}{10}=\dfrac{27}{10}.\)