What's the difference?
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:
Interested and want to find out more? Then check out some of these links:
Dreambox tool (go to 3rd grade addition and subtraction tools)
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.