Question

3) Add without using number line.

(-18) – (20)​

Answer 1

Answer:

(-18)-20 = -18-20

= -1×(18+20)

= -1×(38)

= -38

Answer 2

(-18)-(20)= 18-20

1 of (18+20)

= -38

Here 'of' means multiplying sign.