Question

find any two rational number between 0.5 and 0.55

Answer 1

0.51 ,0.52,0.53,0.54
are rational numbers BTW 0.5 and 0.55

Answer 2

rational number between 0.5 and 0.55

first = (0.5 + 0.55) /2

= 1.05 /2 = 0.525

now rational number between, 0.5 and 0.525

second = 0.5+ 0.525 / 2

= 1.025 / 2
= 0.5125

hence two rational number between 0.5 and 0.55 are 0.525 and 0.5125
and you can write it as 0.52 ,0.51

hope it helps