Maths, Year 3, Adding and Subtracting mentally, including 99.

Hi all,

Here are a set of differentiated worksheets on the objective 'Adding and subtracting numbers mentally, including three-digit numbers and 100.

I've put two columns on this - one for the children to compete against a friend, the other for them to check their work to see who has actually won. This will ensure that they're trying to work them out correctly rather than just cheating to finish first, or copying.

I've differentiated them for my class but you can edit them yourself if you want.

I've also included a section of adding and subtracting 99 (mine are OK with 100) - this is something that I will teach before I allow them to have a go.

Enjoy!

Emlo.