## Arithmetic

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### A1.1 Algebraic operations

This section introduces the basic skills for addition, subtraction, multiplication and division (+ - × ÷) of algebraic expressions.

### A1.3 Removing brackets

What do I do with the brackets? Brackets are useful to group numbers, pronumerals and operations together as a whole. Whatever is around the brackets affects all the things inside the brackets. View...

### A1.4 Algebraic fractions: Addition and subtraction

How do I deal with fractions involving pronumerals? Adding and subtracting fractions always requires a common denominator (which is the lower half of the fraction). These need to be the same before...

### A1.5 Algebraic fractions: Multiplication and division

What is an algebraic fraction? The numerator(top) or denominator(bottom) of a fraction can be in algebraic form involving numbers and variables (represented by pronumerals or letters). In this...

### A2.1 Rearranging formulae

Learn how to manipulate or rearrange formulas that involve fractions and brackets.

### A2.3 Transposition of formulas with challenges

Are you still trying to get that variable on its own from the formula, but it is in a tricky place – or maybe it appears more than once? Here we demonstrate manipulating or rearranging complex...

### Algebra

What is algebra? Why are there letters in the equation? Algebraic expressions involve pronumerals (letters) to represent values. Pronumerals can take many different values. We often need to plug...

### Arithmetic

Links to videos explaining different aspects of arithmetic: decimals, fractions, numbers, percentages & surds, and measurement

### Decimals

What is a decimal? Decimals are another way to express fractions or parts of a whole. We need them for measurement, and it is the easiest way to express fractions on a computer or a calculator....

### Fractions

How do we use fractions? A fraction is the easiest way to express a part of a whole. If you received 18/20 for your test, you got 18 marks correct out of the 20 marks available on the whole test...

### Measurement

What is a unit of measurement? How do I deal with measurement errors? Measurement is an important skill for everyday life but especially in fields of STEM. These pages will enhance your understanding...

### Numbers

Where do you start counting from? zero? Think again! Calculating with numbers is a basic skill for everyday life. Watch these videos to see how the number system of integers (counting numbers)...

### Percentages & surds

How can you turn a raw score in a test into a percentage? If you get 15/20 for a test, you have done as well as someone who got 75 out of 100!