Mental arithmetic level 2

These are not interactive exercises -you need pen and paper to write your answers down.

Division (when the answer is a decimal)	Comparing fractions	Multiplying fractions	Distributive law
Addition and multiplication	Calculations with and without brackets	Adding and subtracting fractions with the same denominator	Using formulae
Fractions to decimals	Adding with negative numbers	Adding and subtracting fractions with different denominators	Using formulae when the unknown is negative
Simplifying fractions	Subracting with negative numbers	Calculating Percentages I	Simplifying algebraic expressions
Fractions of numbers	Addition and subtraction with negatives	Calculating Percentages II	Equations