1) ???

2)

a, \(\frac{-22}{55}=\frac{-22:11}{55:11}=\frac{-2}{5}\)

\(\frac{-26}{65}=\frac{-26:13}{65:13}=\frac{-2}{5}\)

=> ĐPCM

b, \(\frac{114}{122}=\frac{114:2}{122:2}=\frac{57}{61}\)

\(\frac{5757}{6161}=\frac{5757:101}{6161:101}=\frac{57}{61}\)

=> ĐOCM

3)

\(\frac{30303}{80808}+\frac{303030}{484848}=\frac{15}{4}+\frac{5}{8}=\frac{30+5}{8}=\frac{35}{8}\)

~ Ủng hộ nha ae ~

1, \(\frac{5}{-7}=\frac{-5}{7}=\)\(\frac{-10}{14}\)

2, a, \(\frac{-22}{55}=\frac{-26}{65}\)vì \(-22.65=-26.55=-1430\)

    b,\(\frac{114}{122}=\frac{5757}{6161}\)vì \(114.6161=122.5757=702354\)

3,\(\frac{30303}{80808}+\frac{303030}{484848}=\frac{3}{8}+\frac{5}{8}=1\)

a) -22/55 = -2/5 ; -26/65 = -2/5

=> -22/55 = -26/65 (= -2/5)

b) 114/122 = 57/61 ; 5757/6161 = 57/61

=> 114/122 = 5757/6161 (=57/61)

a) Ta có : -22/55 = -2/5 

               -26/65 = -2/5

=> -22/55 = -26/65

b) Ta có : 114/122 = 57/61

               5757/6161 = 57/61

=> 114/122 = 5757/6161

Hok tốt !

nhân chéo đi

hoặc rút gọn

rút gọn chắc thế

a)Ta có \(\hept{\begin{cases}\frac{-22}{55}=\frac{-22:11}{55:11}=\frac{-2}{3}\\\frac{-26}{65}=\frac{-26:13}{65:13}=\frac{-2}{3}\end{cases}}\)=> \(\frac{-22}{55}=\frac{-26}{65}\)

b) Ta có : \(\hept{\begin{cases}\frac{114}{122}=\frac{114:2}{112:2}=\frac{57}{61}\\\frac{5757}{6161}=\frac{5757:101}{6161:101}=\frac{57}{61}\end{cases}\Rightarrow\frac{114}{122}=\frac{5757}{6161}}\)

0,00...0014 trong cho "..." co vo cuc chu so 0

tr 0,1238

0,1238

26.(17+39+44)

26.(56+44)

26.100

2600

=26x(17+44+39)

=26x100

=2600

Tính nhanh:

17 x 26 + 26 x 44 + 39 x 26

= (17 + 44 + 39) x 26

= 100 x 26

= 260

#Fallen Angel

Ta có :

70 = 70 x 1; 70 = 10 x 7; 70 = 2 x 35 ; 70  =  14 x 5

Vậy có 8 phân s