There are two ways to round a number. You can round a number to a specific place value or to a specific significant figure.
Category: Numbers
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 […]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 […]More…
Numbers – Percentages (%)
This post looks at percentages when used in the following 3 scenarios: Finding the % of an amount. Percentage increase / decrease. Expressing an amount as a […]More…
Numbers – Reverse Percentages
Perhaps the most complex question when dealing with percentages. Reverse percentages are used when you are asked to find the original amount. For this, we will use […]More…
Fractions – Adding & Subtracting
Getting to grips with the 4 basic arithmetic operations (Add / Subtract / Multiply / Divide ) when using fractions can easily be achieved once you know […]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 […]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 […]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 […]More…
Numbers – Ratio (Sharing) & 1:n
Ratios usually means that there is a sharing part that is taking place. We have a quatity and we want to share it according to a given […]More…
Fractions – Multiplying & Dividing
Multiplying Fractions. This is perhaps the easiest operation to perform on fractions. It involves multiplying the numerators together and the denominators together.
Simple Interest vs Compound Interest
Interest calculations fall into two categories. Simple interest and compound interest. With Simple interest, you work out the interest on the initial amount based on the interest […]More…