






Chapter 1
count on
Start at 3 Count on 1
difference
The answer to a subtraction problem.
sum
The answer to an addition problem.
addend
The addend is one of the numbers that is being added in order to find a sum.
fact family
3 + 6 = 9 6 + 3 = 9
9 - 6 = 3 9 - 3 = 6
related facts
The numbers of a fact family are related facts.
turnaround facts
These are turnaround fact. You can add 4+7 or 7+4 and still get the sum of 11.
4+7=11
7+4=11
Make a free website with Yola