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N11a - Identifying and working with fractions in ratio problems

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This lesson covers finding a fraction of a quantity. It also covers finding a percentage of a quantity by converting the percentage into a fraction. There is a separate lesson on converting percentages into decimals in order to find percentages: lesson R9c - Finding percentages and percentage changes multiplicatively using decimals. Lessons R9d and R9e, which follow on from lesson R9c, make use of that skill.

Links to past exam questions

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N12a - Interpreting fractions and percentages as operators

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This lesson covers finding a fraction of a quantity. It also covers finding a percentage of a quantity by converting the percentage into a fraction. There is a separate lesson on converting percentages into decimals in order to find percentages: lesson R9c - Finding percentages and percentage changes multiplicatively using decimals.

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N14a - Estimating answers, and checking calculations by using approximation and estimation

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This applet allows you to generate questions on rounding, and to reveal step-by-step solutions using the slider. The steps involved are:

1. Finding relevant consecutive multiples.

2. Finding the midpoint of the consecutive multiples.

3. Identifying where a number lies on a given section of the number line.

4. Deciding what a given number rounds to.

Each of these skills can be practised in isolation by dragging the slider to the appropriate level and then clicking on one of the bullet points towards the top-right to generate another question isolating the same skill.

Rounding a number to the nearest \(x\)

This topic consists only of an examples slide (with embedded video) and a random question generator below.

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This applet allows you to generate questions on rounding, and to reveal step-by-step solutions using the slider. The steps involved are: Finding relevant consecutive multiples. Finding the midpoint of the consecutive multiples. Identifying where a number lies on a given section of the number line. Deciding what a given number rounds to.

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Teachers: log in to access the following:

Slides in PPTX (with click-to-reveal answers)

Slides in PDF (one slide per page, suitable for importing into IWB software)

Worksheet (with space for student work)

Handout (slides with exercises only; 4 per page for reduced printing)

Links to past exam questions

Teachers: log in to access these.

Teachers: log in to view this content.

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N15b - Using inequality notation to specify simple error intervals

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Teachers: log in to access the following: Slides in PPTX (with click-to-reveal answers) Slides in PDF (one slide per page, suitable for importing into IWB software) Worksheet (with space for student work) Handout (slides with exercises only; 4 per page for reduced printing) Links to past exam questions Teachers: log in to access these.

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Teachers: log in to access the following:

Slides in PPTX (with click-to-reveal answers)

Slides in PDF (one slide per page, suitable for importing into IWB software)

Worksheet (with space for student work)

Handout (slides with exercises only; 4 per page for reduced printing)

Links to past exam questions

Teachers: log in to access these.

Teachers: log in to view this content.

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N16a - Applying and interpreting limits of accuracy, including upper and lower bounds

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Teachers: log in to access the following: Slides in PPTX (with click-to-reveal answers) Slides in PDF (one slide per page, suitable for importing into IWB software) Worksheet (with space for student work) Handout (slides with exercises only; 4 per page for reduced printing) Links to past exam questions Teachers: log in to access these.

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