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Topic: Number, Fractions, Decimals, Percentage, Ratio and Proportion (Higher - Unit 3)

Specification References: N1.14h N1.14h Use calculator effectively and efficiently including trigonometrical functions.

Candidates should be able to:

• use a calculator for calculations involving four rules
• use a calculator for checking answers
• enter complex calculations and use function keys for reciprocals, squares, cubes and other powers
• enter a range of calculations including those involving money, time and other measures
• understand and use functions including , –, , , , , , , , memory, brackets and trigonometrical functions
• use a calculator to input numbers in standard form
• use a calculator to explore exponential growth and decay using a multiplier and the power key
• understand the calculator display, knowing how to interpret the display, when the display has been rounded by the calculator and not to round during the intermediate steps of calculation
• interpret the display, for example for money interpret 3.6 as £3.60 or for time interpret 2.5 as 2 hours 30 minutes
• understand how to use a calculator to simplify fractions and to convert between decimals and fractions and vice versa

Notes

This is part of the core number work required across Units 1 and 3. The core number work will be assessed so that it is linked to other specification references within that unit.

This reference includes all the requirements of N1.14 and some additional requirements for the Higher tier only.

Examples

1. A builder employs seven bricklayers.
   Each bricklayer earns £12.60 per hour worked.
   They each work hours per week.
   The builder says he needs £33075 each week to pay his bricklayers.
   Use a calculator to check if he is correct.

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