Question

chin/ muoi mot + tam/ muoi lam + muoi ba/ muoi mot + bay/ muoi lam

tinh cach thuan tien nhat

Answer 1

9/11 + 8/15 + 13/11 + 7/15 =(9/11 + 13/11) + (8/15 + 7/15) = 22/11 + 15/15 = 2+1 =3

Answer 2

(9/11+13/11)+(8/15+7/15)=22/11+15/15=2+1=3

Answer 3

= [ 9/11 + 13/11] + [ 8/ 15 + 7/15 ]

= 22/11 + 1

= 22/11 + 1/1 = 22/11 + 11/11

= 33/11

Answer 4

Đề bài : 9/11 + 8/15 + 13/11 + 7/15=?

(9/11 + 13/11) + (8/15 + 7/15)=

24/11              +         1 = 35/11