What's the difference?

It's constant!

Post date: Feb 10, 2016 1:59:07 PM

Take a look at this quick presentation I've put together to explain constant difference subtraction:

Constant Difference Subtraction

Interested and want to find out more? Then check out some of these links:

Dreambox tool (go to 3rd grade addition and subtraction tools)

Dreambox mini-lesson

Keeping a constant difference

My Addition & Subtraction Pinterest Board

More Number ideas/activities on PrimaryCPD

You can also keep an eye out for constant difference subtraction in the

new, exciting scheme for maths "Operation Maths". Published by Edco, the are mini-lessons in the 4th to 6th class books, which explore constant difference subtraction and how the children can use it as a strategy, in both their written and mental calculations.