1212/2727 = 12/27 = 4/9 = 8/18

2525/5050 = 25/50 = 1/2 = 9/18

Vậy a bằng:

9/18 - 8/18 = 1/18

Nhớ K nha~

1212/2727 = 4/9

2525/5050 = 1/2

4/9 + a = 1/2 

a = 1/2 - 4/9

a =1/18

\(\Rightarrow\frac{12}{27}+a=\frac{1}{2}\Rightarrow\frac{1}{3}+a=\frac{1}{2}\Rightarrow a=\frac{1}{6}\)

Nham

\(\Rightarrow\frac{4}{9}+a=\frac{1}{2}\Rightarrow a=\frac{1}{2}-\frac{4}{9}=\frac{1}{18}\)

Cau do sai ban oi

a, 1212/2727

=1212:101/2727:101

=12/27

b, 2525/5353

=2525:101/5353:101

=25/53

bước 1: rút về số tối giản

bước 2: tìm MSC

bước 3: tính...

\(\frac{1212}{1515}:\frac{2727}{2525}\)

Rút gọn : \(\frac{1212}{1515}=\frac{4}{5}\)

\(\frac{2727}{2525}=\frac{27}{25}\)

\(=>\frac{4}{25}.\frac{25}{27}=\frac{20}{27}\)

~ chúc bn hok tốt ~

cám ơn nha

=20/27

bằng \(\frac{20}{27}\)

1212/1515 :2727/2525=4/5:27/25=4/5.25/27=20/27

Học tốt!

\(\frac{1212}{1515}:\frac{2727}{2525}\)

\(=\frac{1212}{1515}x\frac{2525}{2727}\)

\(=\frac{20}{27}\)

Chúc Học tốt

\(\frac{1212}{1515}:\frac{2727}{2525}=\frac{1212}{1515}x\frac{2525}{2727}=\frac{12x101}{15x101}x\frac{25x101}{27x101}=\frac{12x25}{15x27}=\frac{3x4x5x5}{3x5x27}=\frac{4x5}{27}=\frac{20}{27}.\)

Thanks

1) rút gọn \(\frac{1212}{2727}=\frac{12}{27}\)

2)            \(\frac{2525}{5353}=\frac{25}{53}\) 

 vậy ta có thể nói nó bằng 

dễ như tấn con bê đê

1.\(\frac{1212}{2727}=\frac{1212:101}{2727:101}=\frac{12}{27}\)\(=>\frac{1212}{2727}=\frac{12}{27}\)

2.\(\frac{2525}{5353}=\frac{2525:101}{5353:101}=\frac{25}{53}=>\frac{2525}{5353}=\frac{25}{53}\)

a) \(\frac{1212}{1515}\):\(\frac{2727}{2525}\)

=   \(\frac{1212}{1515}\)* \(\frac{2525}{2727}\)

=     \(\frac{101.12}{101.15}\)* \(\frac{101.25}{101.27}\)

=      \(\frac{12}{15}\). \(\frac{25}{27}\)

=       \(\frac{20}{27}\)

b) ban co the viet ro hon de bai dc ko?

Tính

12x19/18=12,6666666667

 15:25/4=2,4

 1212/1515:2727/25225=7,40007334067