tính 25/42 – 20/63 9/50 – 13/75

2 bình luận về “tính 25/42 – 20/63 9/50 – 13/75”

1. 25/42 – 20/63

   = 75/126 – 40/126

   = [75-40]/126

   = 35/126

   = 5/18

   9/50 – 13/75

   = 27/150 – 26/150

   = [27-26]/150

   = 1/150

   @BadMo od

   Trả lời
2. @25/42 – 20/63

   = (25.63)/(42.63) – (20.42)/(63.42)

   = 1575/2646 – 840/2646

   = (1575 – 840)/2646

   = 735/2646

   = 5 /18

   @ 9/50 – 13/75

   = (9.15)/(50.15) – (13.10)/(75.10)

   = 135/750 – 130/750

   = (135 – 130)/750

   = 5/750

   = 1/150

   #Na

   Trả lời