# Category: Numbers

### Recurring Decimals to Fractions

Writing numbers containing recurring decimals into fractions involves a few steps. These are described here using a few examples. First, we start with… Key to the above process is to. read more…

### Multiplication – Lattice Method

There are few ways to multiply numbers. The method shown in the video below is one of them

### Rationalise the Denominator

Rationalise the denominator means eliminating the SURD from the denominator. Here are a few examples showing how to do this operation. A full video lesson on working with SURDS is. read more…

### Finding the Upper Bound and Lower Bound

With rounding, you often get asked to find two values. These are the Upper Bound (UB) and the Lower Bound (LB) and when these 2 values are written in the. read more…

### Rounding to – the nearest… / a significant figure

There are two ways to round a number. You can round a number to a specific place value or to a specific significant figure. Rounding to a specific place value. read more…

### Negative Numbers – Multiplying & Dividing

The rules for multiplying and dividing involving negative numbers are relatively simple compared to adding and subtracting involving negative numbers. Here they are: Dividing works the EXACT SAME WAY as. read more…

### Negative Numbers – Adding & Subtracting

Adding and subtracting involving negative numbers can be challenging to some students if the rules on negatives numbers are not well understood. This article aims to provide clarity on this. read more…

### Numbers – Factors, Multiples & Prime Factors

Getting confused with Factors, Multiples and Prime factors ??? Well! here are some examples that will hopefully shed some light on the meaning of these terms. Let’s starts with Factors:. read more…

### Numbers – Highest Common Factor (HCF) & Lowest Common Multiple (LCM)

The best way to work out the HCF and LCM of two numbers is to use the prime factor decomposition and Venn Diagram method as it is suited for both. read more…

### Numbers – Multipliers

The concept of ‘Multipliers‘ is a useful one to know when dealing with percentage increase (or decrease) as it allows you to work out the ‘final’ value or the answer. read more…