Through several engaging activities, students will experiment with taking away a “part” from a “whole” group to help them understand the concept of part-part-whole in relation to subtraction. This lesson includes a whole-group activity and a partner activity, as well as independent work and evaluation.
Apply properties of operations as strategies to add and subtract. Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
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