PCSD GRADE 1 MATH CURRICULUM MAP MATH EXPRESSIONS UNIT 2 – ADDITION and SUBTRACTION STRATEGIES

24 Days/16 Lessons Lesson Focus Skills Unit Test Objectives Assessments Common Core State Standards  Use addition to solve 2A: Use strategies to add Formative Represent and solve problems story problems and and subtract within  QQ 1 involving addition and visualize equality. 10. [1.OA.3; 1.OA.5; - Objectives 2A, 2D, 2E subtraction.  Use = to write 1.OA.6]  QQ 2 1.OA.1: Use addition and addition equations - Objectives 2A, 2B, 2E subtraction within 20 to solve and determine if an 2B: Solve addition and  QQ 3 word problems involving equation is true. subtraction equations - Objectives 2A, 2B, 2D, 2E situations of adding to, taking  Represent and solve with unknowns.  QQ 4 from, putting together, taking addition story [1.OA.8] - Objectives 2A, 2C, 2D, 2E apart, and comparing, with problems and unknowns in all positions, e.g., determine if addition 2C: Relate addition and Summative by using objects, drawings, and equations are true. subtraction. [1.OA.6]  Unit 2 Assessment equations with a symbol for the  Find the total in  Performance Task 2 (optional) unknown number to represent addition equations. 2D: Demonstrate an the problem.  Count on from the understanding of the greater number to equal sign and add. determine if addition and subtraction Understand and apply properties  Solve addition of operations and the equations. equations are true or false. [1.OA.7] relationship between addition  Solve subtraction and subtraction. problems and 2E: Represent and solve 1.OA.3: Apply properties of equations. addition and operations as strategies to add  Represent and solve subtraction story and subtract. (Students need not subtraction problems, problems. [1.OA.1] use formal terms for these and write and solve properties). Examples: If 8 + 3 = subtraction 11 is known, then 3 + 8 = 11 is equations. also known. (Commutative  Relate addition and property of addition.) To add 2 + subtraction and solve 6 + 4, the second two numbers vertical forms. can be added to make a ten, so  Write and solve 2 + 6 + 4 = 2 + 10 = 12. addition and (Associative property of subtraction equations addition.) and vertical forms.

Grade 1 Unit 2 5/11/2018 Page 1 of 2  Use the Common Add and subtract within 20. Core Content 1.OA.5: Relate counting to Standards and addition and subtraction (e.g., by Practices in a variety counting on 2 to add 2). of real world problem solving situations. 1.OA.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 (found on pg. 79P) + 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).

Work with addition and subtraction equations. 1.OA.7: Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.

1.OA.8: Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. For example, determine the

Grade 1 Unit 2 5/11/2018 Page 2 of 2 unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? – 3, 6 + 6 = ?.

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