15/7 + 7/12+5/7+18/21+9/5+10/24=……. Cứu e vs ạ

2 bình luận về “15/7 + 7/12+5/7+18/21+9/5+10/24=……. Cứu e vs ạ”

1. 15/7 + 7/12+5/7+18/21+9/5+10/24

   =15/7 + 7/12+5/7+6/7+9/5+5/12

   =(15/7 +5/7+6/7)+(7/12+5/12)+9/5

   =26/7+12/12+9/5

   =26/7+1+9/5

   =33/7+9/5

   =228/35

   Trả lời
2. 15/7 + 7/12+5/7+18/21+9/5+10/24=

   = ( 15/7 + 5/7+18/21 ) + ( 7/12 + 10/24 ) + 9/5 

   =(20/7 + 6/7 ) + ( 7/12 + 5/12 ) + 9/5

   = 26/7 + 12 / 12 + 9/5 

   = 130/35 + 1 + 63/35 

   = (130/35 + 63/35) + 35/35

   = 193/35 + 35/35

   =228/35

   ( lẻ quá )

    

   Trả lời