Topic 2  Adding and subtracting whole numbers and decimals
Commutative Property of AdditionWhen two numbers are added, the sum is the same regardless of the order of the addends.
Associative Property of AdditionWhen three or more numbers are added, the sum is the same regardless of the grouping of the addends.
Identity Property of AdditionThe sum of any number and zero is the original number.
For example 5 + 0 = 5. 
Vocabulary
.

Decimal Switch

Decimal Squares Activities On Line 
.
.
Whiteboard Tools  the decimals number lines tool