Môn Toán Lớp 5: Tính nhanh: `2` `3/4 – 3/7 + 2/8 – 4/7`

2 bình luận về “Môn Toán Lớp 5: Tính nhanh: `2` `3/4 – 3/7 + 2/8 – 4/7`”

1. 2 3/4 – 3/7 + 2/8 – 4/7

   = 11/4 – 3/7 + 2/8 – 4/7

   = ( 11/4 + 2/8 ) – ( 3/7 + 4/7 )

   = ( 22/8 + 2/8 ) – 1

   = 24/8 – 1

   = 3 – 1

   = 2

   Trả lời
2. 2 3/4 – 3/7 + 2/8 – 4/7

   = 2 + 6/8 – 3/7 + 2/8 – 4/7

   = 2 + (6/8 + 2/8) – (3/7 + 4/7)

   = 2 + 8/8 – 7/7

   = 2 + 1 – 1

   = 3-1

   = 2

   #HPHG

    

   Trả lời