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Task: calculate answer to questions about speed, distance, and time. Assessment focus: using a formula.

Students calculate percentage increases and decreases for odd jobs and show their working.

This practical task involves students making best estimates of sets of items and clearly demonstrating their method(s) of estimation.

Students estimate and explain how they estimated their answer for two number problems: one involving multiplication; and the other division.

Students calculate the percentage by which clothing prices have been reduced.

Students solve number problems involving the addition and subtraction of fractions.

Students calculate an exact square root and estimate approximate square roots by finding the length of the square flower bed of a given area, and give an explanation for their answers.

Students express a distance as a percentage of the distance of a whole journey, and calculate percentages or fractions of parts of the journey.

Students calculate how price changes affect a purchase.

Students explain errors in calculations that include all operations, decimal values, and percentages.

Students select which person has correctly applied the laws of indices to some problems, and explain their choice.

Students evaluate a number of expressions involving the laws of indices (exponents).

Students solve problems involving rates of pay based on a formula using powers, and compare this to a fixed rate of pay.

Students calculate and evaluate powers of whole numbers.

Students perform calculations using fractions with different denominators.