1/7 × 21/5 × 5/9 + 2/3 × 5/7 + 2/7 × 4/6

2 bình luận về “1/7 × 21/5 × 5/9 + 2/3 × 5/7 + 2/7 × 4/6”

1. 1/7 xx 21/5 xx 5/9 + 2/3 xx 5/7 + 2/7 xx 4/6

   = 1/3 + 10/21 + 4/21

   = 7/21 + 10/21 + 4/21

   = 17/21 + 4/21

   = 21/21

   = 1

   #Rei

   Trả lời
2. 1/7 xx 21/5 xx 5/9 + 2/3 xx 5/7 + 2/7 xx 4/6

   = 1/3 + 10/21 + 4/21

   = 7/21 + 10/21 + 4/21

   = 21/21 = 1

   -> Vậy kết quả bằng 1

   $\text{@Tuyetnhi}$

   Trả lời