(i) –1 and –2

Three rational numbers between –1 and –2 are –1.1, –1.2 and –1.3.

(ii) 0.1 and 0.11

Three rational numbers between 0.1 and 0.11 are 0.101, 0.102 and 0.103.

(iii)

We can write and

.

(iv)

LCM of 4 and 5 is 20.

We can write and

So, three rational numbers between