maths

1. $p +$12 = $120
$P=$120-$12
= $108

2. 1 5/6 x 1/3 -:- 4/9
=11/6 x 1/3 x 9/4
=11/8
=1 3/8

3. 2/7 -:- ( 3/5 x 1/6 )
= 2/7 -:- (1/10)
=2/7 x 10/1
=20/7
=2 6/7

4. 1 1/4 x 12
=5/4 x 12
=15