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Addition; subtraction; multiplication; division; problems using the four rules; miles and kilometres; speed, time and distance; maps and plans; cancelling; mixed numbers and improper fractions; multiplication of fractions; percentages - expressing one amount as a percentage of another; percentage problems; gross profit; net profit; more about percentages; commission; discount; deposits and cancellations; currency conversion; percentage puzzles; setting a price; days inclusive; 24 hour clock; time zones; using a timetable and fare table; booking a holiday; Value Added Tax; hiring a care; chartering; graphs; pie charts; petty cash; tests; answers.