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)
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.