a,[23.37-11.37]:37 b,91.172+91.13 c,5 ngũ 3.73-5 ngũ 3.36-37.25 d,45+15.13-3. 2 ngũ 4

1 bình luận về “a,[23.37-11.37]:37 b,91.172+91.13 c,5 ngũ 3.73-5 ngũ 3.36-37.25 d,45+15.13-3. 2 ngũ 4”

1. Giải đáp:

   a) (23.37 – 11.37) : 37

   = [37 . (23-11)] : 37

   = [37 . 12] : 37

   = 37.12:37

   =(37:37).12

   =1.12

   =12

   b) 91.172+91.13

   =91.(172+13)

   = 91.185

   = 16835

   c) 5^3 . 73 – 5^3 . 36 – 37 . 25

   = 5^3 . (73-36) – 37.25

   = 5^3 . 37 – 37 .25

   = 125 . 37-37.25

   = 37.(125-25)

   =37.100

   =3700

   d) 45 + 15.13 – 3 . 2^4

   = 45 + 15.13 – 3.16

   = 3.15+15.13-3.16

   = 3.(15-16) + 195

   = 3.(-1) + 195

   = -3+195

   =195-3

   =192.

    

   Trả lời