1/2×1/3-1/8 5/2;1/4-1/8 9/20-9/15×5/12

2 bình luận về “1/2×1/3-1/8 5/2;1/4-1/8 9/20-9/15×5/12”

1. 1/2 xx 1/3 – 1/8

   = 1/6 – 1/8

   = 1/24

   ____________________

   9/20 – 9/15 xx 5/12

   = 9/20 – 1/4

   = 4/20 = 1/5

   _________________________

   5/2 : 1/4 – 1/8

   = 5/2 xx 4/1 – 1/8

   = 10/1 – 1/8

   = 79/8

   Trả lời
2. Giải đáp + Lời giải và giải thích chi tiết:

   1/2 xx 1/3 – 1/8

   = 1/(2xx3) – 1/8

   = 1/6 – 1/8

   = (1xx8)/(6xx8) – (1xx6)/(8xx6)

   = 8/48 – 6/48

   = (8-6)/48

   = 2/48 = 1/24

   _______________________________

   5/2 : 1/4 – 1/8

   = 5/2 . 4/1 – 1/8

   = 10 – 1/8

   = 80/8 – 1/8

   = 79/8

   _______________________________

   9/20 – 9/15 xx 5/12

   = 9/20 – 1/4

   = 9/20 – 5/20

   = 4/20 = 1/5

   Trả lời