Compare estimated experimental probabilities with theoretical probabilities, recognising that: - when experiments are repeated different outcomes may result - increasing the number of times an experiment is repeated generally leads to better estimates of probability b. Comprehend and solve problems related to interest (sosial arithmetic) 4. Use the unitary method to solve simple problems involving ratio and direct proportion Recognise when two quantities are directly proportional solve problems involving proportionality, e.g. Simple interest, discount, profit, loss and tax Recognise when fractions or percentages are needed to compare different quantities Compare two ratios interpret and use ratio in a range of contexts. Calculate and solve problems involving percentages of quantities and percentage increases or decreases express one given number as a fraction or percentage of another choosing the correct numbers to take as 100% or as a whole, including simple problems involving personal or household finance, e.g.
Add and subtract fractions and mixed numbers calculate fractions of quantities (fraction answers) multiply and divide an integer by a fraction multiply and divide fractions, interpreting division as a multiplicative inverse, and cancelling common factors before multiplying or dividing b.
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