Mississippi Standards. What is the commutative property? It is used in addition. Commutative property is when a number sentence is turned around and it still means the same thing.

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Study GuideCommutative Property

Worksheet/Answer keysCommutative Property

Worksheet/Answer keysCommutative Property

Worksheet/Answer keysCommutative Property

Vocabulary/Answer keysCommutative Property

MS.CC.NBT.1. Number and Operations in Base Ten

Use place value understanding and properties of operations to add and subtract.

NBT.1.4. Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

MS.CC.OA.1. Operations and Algebraic Thinking

Add and subtract within 20.

OA.1.5. Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

OA.1.6. Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Understand and apply properties of operations and the relationship between addition and subtraction.

OA.1.3. 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.)

OA.1.4. Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.