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# CCSS.Math.Content.1.OA.B.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.)

Authors: National Governors Association Center for Best Practices, Council of Chief State School Officers

Title: CCSS.Math.Content.1.OA.B.3 Apply Properties Of Operations As Strategies To Add And Subtract.... Operations and Algebraic Thinking - 1st Grade Mathematics Common Core State Standards

Publisher: National Governors Association Center for Best Practices, Council of Chief State School Officers, Washington D.C.

(Page last edited 10/08/2017)

1. Add and Subtract through 12 - Look at the addition and subtraction problem and solve the answer using these concepts.
2. Domino Fact Family - Worksheet; Pick a domino, then create a fact family from it.
3. Fact Families - Worksheet; answer these problems using fact family logic.
4. Fact Families - Online quiz; self checking
5. Fact Families - Click the buttons and make a fact family.
6. Mixed up Twelves - Worksheet; word problems using fact families.
7. Names of Numbers - Worksheet; find the problems that fit with this fact family number.
8. Number Balance - Scroll down and click on the game Number Balance; activity for developing understanding of simple equations. Hide individual numbers or symbols as you wish. Designed for teacher led investigations.
9. Number Bonds - video; explaining and representing addition and subtraction number sentences.
10. Number Operations - Find the missing number in these fact families.
11. Number Sentences - Write a plus(+)?or a minus(-) sign in the circle to make the number sentence true.
12. Relate Addition and Subtraction - Worksheet; visual to see how addition and subtraction relate.
13. Related Addition Facts - Online quiz; self checking
14. Related Facts - Video; short lesson- how to use face families.
15. Related Subtraction Facts - Online quiz; self checking
16. Visual Fact Families - Worksheet; write the number representation of these objects. Internet4classrooms is a collaborative effort by Susan Brooks and Bill Byles. 