Brackets in algebra are used to show when a calculation has been repeated. The number outside the brackets shows how many times the calculation has been repeated. STEP 1 - Multiply out this bracket.

This sounds like a job for Multiplication Boy! Luckily, our hero in a world without maths knows what to do. He speeds up Mr Sharma’s counting by showing him how to use arrays to multiply.

Now that you've learned to do basic math in Excel, your calculations will never slow you down again. With addition, ...

Multiplying two-digit numbers by 11 Multiplying two-digit numbers by 11 is a breeze with this clever trick from math.hmc.edu.