# Number GCSE revision

###### Higher only
Integers, primes, square and cube numbers   card
Integer and decimal addition and subtraction   card
Integer and decimal multiplication   card
Integer and decimal division   card
Convert improper fractions and mixed numbers   card
Fraction mutliplication and division   card
Finding a fraction of an amount   card
Place value and ordering of decimal numbers   card
Calculating with negative numbers   card
Order of operations using BIDMAS   card
Convert fractions, decimals and percentages   card
Convert recurring decimals and fractions   card
Finding a percentage of an amount   card
Increase or decrease an amount by a percentage   card
Express one number as a percentage of another   card
Reverse percentages   card
Repeated percentage change   card
Simple interest, compound interest and depreciation   card
Reverse compound interest yes card
Expontential growth or decay yes card
Powers and roots   card
Factors and multiples   card
HCF and LCM   card
Reciprocals   card
Product of primes   card
HCF and LCM using venn diagrams   card   video
Rounding to 1, 10 and 100   card
Rounding to decimal places   card
Rounding to significant figures   card   video
Truncating to decimal places   card   video
Error intervals   card   video
Estimating   card
Lower and upper bounds yes card
Laws of indices   card   video 1    video 2
Change base of indices yes card   video
Zero and negative indices   card   video 1   video 2
Fractional indices yes card   video
Convert standard form to/from ordinary form   card    video 1   video 2
Standard form multiplication and division   card   video 1    video 2
Standard form addition and subtraction   card   video
Writing and simplifying ratio   card
Write ratio as a fraction   card
Share an amount in a ratio   card
Use ratio diagrams   card
Solve ratio problems   card
Direct proportion problems   card
Inverse proportion problems   card
Finding proportion formulae yes card
Rules for x ÷ + - surds yes card   video 1   video 2
Expand surd brackets yes card   video
Simplify individual surds yes card   video
Simplify by rationalising a surd yes card   video 1   video 2 