Theo thứ tự : 5/6 ; 2/3 ; 2/3 ; 3/2 ; 2/3 ; 3/8 ; 3/1(hay là 3)

\(\dfrac{10}{12}=\dfrac{5}{6}\)        \(\dfrac{8}{12}=\dfrac{2}{3}\)        \(\dfrac{10}{15}=\dfrac{2}{3}\)        \(\dfrac{27}{18}=\dfrac{3}{2}\)        \(\dfrac{24}{36}=\dfrac{4}{6}=\dfrac{2}{3}\)

\(\dfrac{18}{48}=\dfrac{3}{8}\)        \(\dfrac{42}{14}=\dfrac{6}{2}=\dfrac{3}{1}\)

10/12 = 5/6 

8/12 = 2/3 

10/15 = 2/3 

27/18 = 3/2 

18/48 = 3/8 

42/14 = 3 

\(\frac{-63}{108}\)= \(\frac{-7}{12}\)

\(\frac{-33}{-77}\)= \(\frac{3}{7}\)

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

\(\frac{14}{63}\)=\(\frac{2}{9}\)

\(\frac{-15}{25}\)=\(\frac{-3}{5}\)

\(\frac{-45}{18}\)=\(\frac{-5}{2}\)

\(\frac{12}{15}\)=\(\frac{4}{5}\)

\(\frac{20}{25}\)=\(\frac{4}{5}\)

\(\frac{31}{12}\):Là phân số tối giản

t.i.c.k nha                                           

12/15 = 4/5                                                 15/10 = 3/2

14/21 = 2/3                                                 70/20 = 7/2

18/12 = 3/2                                                  55/66 = 5/6

( 4/5 - 2/3 - 3/2 ) : ( 3/2 - 7/2 - 5/6 ) = -41/30 : -17/6

                                                   = 41/85

a) 15 / 18 = 5/6 ( rút gọn cho 3)

b) 30/120 = 1/4 (rút gọn cho 30)

c) 45 / 27 = 5/3 ( rút gọn cho 9 )

d) 75 / 300 = 1/4 (rút gọn cho 75)

a)là \(\frac{5}{6}\)               b)là \(\frac{1}{4}\)              c)là \(\frac{5}{3}\)                   d)là \(\frac{1}{4}\)

tik nha bạn thân!

a) =  5/6

b) = 1/4

c) = 5/3

d) = 1/4

18/24=3/4

15/35=3/7

40/56=5/7

96/36=16/6

ps 8/10=ps:4/5 và 32/40

k mik nha!^^^^^^^

\(\frac{18}{24}=\frac{3}{4}\)

\(\frac{15}{35}=\frac{3}{7}\)

\(\frac{40}{56}=\frac{5}{7}\)

\(\frac{96}{36}=\frac{8}{3}\)

Phân số bằng \(\frac{8}{10}\) là:

\(\frac{12}{15};\frac{4}{5};\frac{32}{40}\)

18/24 = 3/4

15/35 = 3/7

40/56 = 5/7 

96/36 = 8/3

Phân số bằng 8/10 là 12/15 ; 4/5 và 32/40

\(\frac{15}{30}=\frac{15:15}{30:15}=\frac{1}{2}\)

\(\frac{20}{25}=\frac{20:5}{25:5}=\frac{4}{5}\)

\(\frac{18}{18}=1\)

\(\frac{25}{45}=\frac{25:5}{45:5}=\frac{5}{9}\)

\(\frac{15}{30}=\frac{1}{2}\)

\(\frac{20}{25}=\frac{4}{5}\)

\(\frac{18}{18}=1\)

\(\frac{25}{45}=\frac{5}{9}\)

=3/10

4/5

1/1

5/9

A

A

A

C-C-B-B-C

7,B

8,C

9,B

10,B

11,C

câu 12 bị lỗi r bn

7: B

8: C 

9: B 

10: B 

11: C 

12: lỗi 

c1

a,3/15 = 3:3/15:3  = 15 

33/44 = 33:11/44:11 = 34 

2/8 = 2:2/8:2 = 1/4 

b,9/12 =9:3/12:3  = 34 

24/36 =24:12/36:12 = 23 

3/8 = 3:1/8:1 = 3/8 

c2

a) =12x(4+6)/24

= 12x10/24

=120/24

=5

b,16x8-16x2/12x4

=16x(8-2)/48

=16x6/48

=2

c3

5/8=45/72

20/15=4/3=96/72

24/32=3/4=54/72

15/18=5/6=60/72

77/99=7/9=56/72

c4

2/3=2/3

12/15=4/5

24/18=4/3

16/48=1/3

75/100=3/4

30/45=2/3

12/36=1/3

20/15=4/3

các phân số lớn hơn 1 luôn có mẫu số bé hơn tử số 

vậy các số lớn hơn 1 là  24/18,20/15

k mk nha thank mọi ng'

a, \(\frac{3}{15}=\frac{1}{5}=\frac{4}{20}\);   \(\frac{33}{44}=\frac{3}{4}=\frac{15}{20}\);       \(\frac{2}{8}=\frac{1}{4}=\frac{5}{20}\)

b, \(\frac{9}{12}=\frac{3}{4}=\frac{18}{24}\);     \(\frac{24}{36}=\frac{2}{3}=\frac{16}{24}\);      \(\frac{3}{8}=\frac{9}{24}\)

Bài 2 :

a,\(\frac{12x4+12x6}{24}=\frac{12x\left(4+6\right)}{24}=\frac{1x10}{2}=\frac{10}{2}=\frac{5}{1}\)

b, \(\frac{16x8-16x2}{12}=\frac{16x\left(8-2\right)}{12}=\frac{8x6}{6}=\frac{8}{1}\)

bài 1

a,3/15 = 3:3/15:3  = 15 

33/44 = 33:11/44:11 = 34 

2/8 = 2:2/8:2 = 1/4 

b,9/12 =9:3/12:3  = 34 

24/36 =24:12/36:12 = 23 

3/8 = 3:1/8:1 = 3/8