Mental Math Tips for Paper 1

Question 1

look for fractions in different calculations

Answer 1

e.g. 0.5 = 1/2

140 / 24 = 10

2.12/106 = 2/100 = 0.02

Question 2

divide or multiple by 0.1/0.2 / similar

Answer 2

CONVERT TO FRACTION
e.g. 0.1 = 1/10

then do normal fraction rules