a= 14/19 ( chia 101 )

b=137/139 ( chia 1001 )

\(\frac{1414}{1919}=\frac{1414:101}{1919:101}=\frac{14}{19}\)

\(\frac{137137}{139139}=\frac{137137:1001}{139139:1001}=\frac{137}{139}\)

1414/1919 = 1414:101/1919:101=14/19

\(\frac{1414}{1919}=\frac{1414:101}{1919:101}=\frac{14}{19}\)

**** cho mình đi

\(1:\frac{0}{12},\frac{1}{11},\frac{5}{7},\frac{7}{5}\)

\(2a:D\)

\(b,\)ko có đáp án đúng

\(3a,\frac{14}{9}\)

\(b,\frac{137}{139}\)

Ủa lạ vậy ta??!!

1. 0/12; 1/11; 2/10; 3/9; 4/8; 5/7; 6/6; 7/5; 8/4; 9/3; 10/2; 11/1 (ko có 12/0 nhé :)) )

2. a) D.

    b) Không có đáp án (đáp án E. 0/2012 :v)

3. a) 14/19

    b) 137/139

Chúc bạn học tốt !!!

a )   − 1212 − 2424 = ( − 1212 ) : ( − 1212 ) ( − 2424 ) : ( − 1212 ) = 1 2

b )   120120 − 240240 = 120120 : ( − 120120 ) − 240240 : ( − 120120 ) = − 1 2

c)  1313 − 1414 = 1313 : ( − 101 ) − 1414 : ( − 101 ) = − 13 14

a) 33 66 = 33 : 33 66 : 33 = 1 2 b ) − 22 77 = − 22 : 11 77 : 11 = − 2 7

c ) 3030 6060 = 3030 : 3030 6060 : 3030 = − 1 2 d ) − 1212 − 2424 = ( − 1212 ) : ( − 1212 ) ( − 2424 ) : ( − 1212 ) = 1 2

e ) 120120 − 240240 = 120120 : ( − 120120 ) − 240240 : ( − 120120 ) = − 1 2

f ) 1313 − 1414 = 1313 : ( − 101 ) − 1414 : ( − 101 ) = − 13 14

-2/3

7/13

3/5

TK
-2/3

7/13

3/5

tham khảo

-2/3

7/13

3/5

a; \(\dfrac{1919}{2121}\) = \(\dfrac{1919:101}{2121:101}\) = \(\dfrac{19}{21}\)

b; 17 x 5 - \(\dfrac{17}{120}\) - 103

= 85 - \(\dfrac{17}{120}\) - 103

= \(\dfrac{10200}{120}\) - \(\dfrac{17}{120}\) - \(\dfrac{12360}{120}\)

= \(\dfrac{10183}{120}\) - \(\dfrac{12360}{120}\)

= \(\dfrac{-2177}{120}\)

c; 2929 - \(\dfrac{101}{2\times1919}\) + 404

= 2929 - \(\dfrac{1}{38}\) + 404

= \(\dfrac{111302}{38}\) - \(\dfrac{1}{38}\) + \(\dfrac{15352}{38}\)

= \(\dfrac{111301}{38}\) + \(\dfrac{15352}{38}\)

 = \(\dfrac{126653}{38}\)