There are ways to find approximate solutions by simplifying calculations. For example, it is not always necessary to give the exact number - you can give an approximate number by rounding up or down.
What is to the nearest hundred?
What is to the nearest whole number?
Estimate the total cost of five packets of sweets that cost each, and two drinks costing each.
Estimate what is divided between three people.
Round to one decimal place.
Round to two decimal places.
Which number has three significant figures?
Round to two significant figures.
Round to three significant figures.
A number squared makes . What is this number correct to one decimal place?