Learning how to work out volumes can be very important for all sorts of applications - mainly in manufacturing and transportation. A 'prism' is a shape with a constant cross section, such as a cardboard box. It basically means that if you cut the prism in half the shape will be the same in the middle:   Try the Quick Test volumes of 3D shapes To … [Read more...]

How to change the subject of a formula. A formula is a special equation which deals with 'variables.' Variables are bits of information that can change each time you deal with the formula. For instance, one of the best known formulas is: Speed = Distance / Time ... and we use it every time we go somewhere. If you're driving at 30 miles per hour - the numbers can be … [Read more...]

How to solve linear equations .. some of them you'll solve without really thinking about! Suppose you bought a CD for £8 and then two books at the same price. The total cost is £25 and, with a little bit of arithmetic, you might work out the price of each book is £8.50. Mathematicians like to call these "linear equations" and they look something like: 2B + 8 = … [Read more...]

How to work out the volume of a cylinder is typically a grade 4 GCSE question.. GCSE Grade C question to calculate the volume of a cylinder with a radius of 3cm and a height of 4cm. How to work out the volume of a can of coke. Just a quick video to calculate if 330ml is accurate. It is... but my estimation shows 380ml ! I've not allowed for the coke can design and … [Read more...]

How to use the rules of indices is very useful in maths .. ..as it is a convenient way of writing down large numbers that have many repeating terms. It's quicker to write 10^6 than 1,000,000 each time. The index (sometimes called the exponent) simply says how many times the number is used in the calculation. So 10³ is the same as 10 x 10 x 10 which equals 1000. This is … [Read more...]