This is the follow up maths worksheet to the earlier explanation on how to estimate on a number line up to 10 000.
Most of the work on number lines in year 6 involve using decimals so this is a good chance to make sure that large whole numbers are understood. All answers are approximate but a guess can be considered good if it is about 50 either side of the answer given. It is also worth noting that because the scale used is about 1.5 cm for a thousand and that a millimetre represents over 60, to get within 50 the approximation needs to be within a mm on the scale! Very tricky!