bn ơi hình như sai đề rồi , số cuối cùng là 17/72

\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)

\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)

\(=\frac{15}{15}+\frac{13}{13}\)

\(=1+1\)

\(=2\)

Chúc bạn học tốt nha !!! 

\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)

\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)

\(=1+1\)

\(=2\)

=(4/15+11/5)+(8/13+5/13)

=37/15+1=52/15

k mink nha

9/8 : 27/16 =2/3

C1: 9/5:17/15 + 8/5 : 17/15

= 27/15 + 24/15

=3

C2: 9/5 : 17/15 + 8/5 : 17/15

= ( 9/5 + 8/5 ) : 17/15

= 17/5 : 17/15

= 3

= 17/7 + 4/7 - 2/5 + 3/5

= 21/7 - 5/5

= 3 - 1

= 2

cách 1: 9/5:17/15 + 8/5:17/15=27/17+24/17=3

cách 2 :9/5:17/15+8/5:17/15=17/15 x15/17+8/5 x15/17=15/17 x (9/5+8/5)=15/17 x 17/5 = 3

Lay (59/18 + 46/9) + (75/14 + 15/7) + (5/2 + 47/18)

De et a

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 ???

\(\frac{2}{3}\times\frac{10}{21}\times\frac{3}{2}\)

\(=\left(\frac{2}{3}\times\frac{3}{2}\right)\times\frac{10}{21}\)

\(=\left(\frac{1}{1}\times\frac{1}{1}\right)\times\frac{10}{21}\)

\(=1\times\frac{10}{21}\)

\(=\frac{10}{21}\)

dau buoi

giup mik nha

de cai dau buoi