\(\frac{3}{22}\times\frac{3}{11}\times22\)

1.\(=\frac{3\times3\times22}{22\times11\times1}\)

\(=\frac{3\times3}{11\times1}\)

\(=\frac{9}{11}\)

2.  \(=\frac{9}{242}\times22\)

\(=\frac{198}{242}\)

\(=\frac{9\times2\times11}{2\times11\times11}\)

\(=\frac{9}{11}\)

\(\left(\frac{1}{2}+\frac{1}{3}\right)\times\frac{2}{5}\)

1.\(=\frac{5}{6}\times\frac{2}{5}\)

\(=\frac{5\times2}{3\times2\times5}\)

\(=\frac{1}{3}\)

2.\(\)\(=\frac{1}{2}\times\frac{2}{5}+\frac{1}{3}\times\frac{2}{5}\)

\(=\frac{1}{5}+\frac{2}{15}\)

\(=\frac{3}{15}+\frac{2}{15}\)

\(=\frac{5}{15}=\frac{1}{3}\)

Have a good day

ko ai bit thi thui ko tra loi thi cam

a, 3/22 x 3/11 x 22

Cách 1

  3/22 x 3/11 x 22 = 9/242 x 22

                            = 198/242

                            = 9/11

Cách 2

3/22 x 3/11 x 22 = 3 x 3 x 22/22 x 11 x 1

                          = 9/11

b,( 1/2 + 1/3) x 2/5

Cách 1

( 1/2 + 1/3 ) x 2/5 = 5/6 x 2/5

                            = 10/30

                            = 1/3

Cách 2

( 1/2  +1/3) x 2/5 = 1/2 x 2/5 + 1/3 x 2/5

                           = 2/10  +  2/15

                           = 1/5  +  2/15

                           = 3/15  +  2/15

                           = 5/15

                           = 1/3

c, 3/5 x 17/21 + 17/21 x 2/5

Cách 1

3/5 x 17/21 + 17/21 x 2/5 = 51/105 + 34/105

                                        = 85/105

                                        =  17/21          

Cách 2

3/5 x 17/21 + 17/21 x 2/5 = 17/21 x (3/5 +2/5)

                                         = 17/21 x 5/5

                                         = 17/21 x 1

                                         = 17/21

 HỌC TỐT ( k mk nhé)

2/3 *  10/21 * 3/2 = (2/3 * 3/2) * 10/21 = 1 * 10/21 = 10/21

22/5 * 12 * 5/12 = 22/5 * (12 * 5/12) = 22/5 * 5 =22

7/2 * 28/81 * 2/7= (7/2 * 2/7) * 28/81 = 1 * 28/81 =28/81

5/17 * 21/4 * 47/15 * 0 = 0

~Study well~

#Seok_Jin#

ARE YOU KOREAN ???

3\22*3\11*22

=9\22*11

=9\22

11\22

=9\11

9/11 ca hai cach

a: \(=\dfrac{3}{22}\cdot22\cdot\dfrac{3}{11}=3\cdot\dfrac{3}{11}=\dfrac{9}{11}\)

b: \(=\dfrac{5}{6}\cdot\dfrac{2}{5}=\dfrac{1}{3}\)

c: =17/21(3/5+2/5)=17/21