a) ( 5/4 – 3/8 + 1 1/12 ) – ( 3 1/2 – 11/4 ) b) ( 1 3/4 – 2 1/5 ) – ( 7/10 – 1/2 ) – 5 1/2

2 bình luận về “a) ( 5/4 – 3/8 + 1 1/12 ) – ( 3 1/2 – 11/4 ) b) ( 1 3/4 – 2 1/5 ) – ( 7/10 – 1/2 ) – 5 1/2”

1. Answer

   a, (5/4 – 3/8 + 1 1/12) – (3 1/2 – 11/4)

   = (5/4 – 3/8 + 13/12) – (7/2 – 11/4)

   = (7/8 + 13/12) – 3/4

   = 47/24 – 3/4

   = 29/24

   b, (1 3/4 – 2 1/5) – (7/10 – 1/2) – 5 1/2

   = (7/4 – 11/5) – 7/10 + 1/2 – 11/2

   = {-9}/20 – 7/10 – 5

   = -23/20 – 5

   = -123/20

   Trả lời
2. a, ( 5/4 – 3/8 + 1 1/12 ) – ( 3 1/2 – 11/4 )

   = ( 5/4 – 3/8 + 13/12 ) – ( 7/2 – 11/4 )

   = ( 7/8 + 13/12 ) – ( 7/2 – 11/4 )

   = 47/24 – ( 7/2 – 11/4 )

   = 47/24 – 7/2 + 11/4

   = -37/24 + 11/4

   =29/24

   __________________

   b, ( 1 3/4 – 2 1/5 ) – ( 7/10 – 1/2 ) – 5 1/2

   = ( 7/4- 11/5) – ( 7/10 – 1/2 ) – 11/2

   =-9/20 – ( 7/10 – 1/2 ) – 11/2

   =-9/20 – 1/5 – 11/2

   =-13/20 -11/2

   =-123/20

   @Lynacute

   Trả lời