Female shopper, brown hair, sunglasses, grey top: When I go shopping I always like to know how much I'm spending. Rounding always helps me when I'm shopping. For instance I've paid £1.10 for this ...

Estimating means making numbers simpler but keeping their value close to what it was. The result is not exact, but it gives an idea of what the total will be. There are steps which can be followed to ...