Next week will be looking at Negative numbers and Roman numerals.

Negative numbers

Any number below zero is a negative number. Negative numbers are always written with a – sign in front of them and they are counted from zero to the left. Negative numbers get lower the further we move left, so -5 is less than -2.

Roman Numbers

The Romans had a completely different numbering system to the one that we have today. Here is a list of Roman numerals and their values from 1-10:

Rules

There are a few rules for writing numbers with Roman numerals. Repeating a numeral up to three times represents addition of the number. For example, III represents 1 + 1 + 1 = 3. Only I, X, C, and M can be repeated; V, L, and D cannot be, and there is no need to do so.

Check out the following games, play the ‘The Mission 2110 Roboidz’** **placing the numbers in numerical order from lowest to highest.

http://www.bbc.co.uk/bitesize/ks2/maths/number/negative_numbers/play/

Check out the ‘Mine Mayhem’ game identifying Roman Numerals.

http://mathsframe.co.uk/en/resources/resource/284/Roman_Numerals_Mine_Mayhem