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CCSS.Math.Content.2.OA.A.1 Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. 1
- CCSS.Math.Content.2.OA.C.3
Grade 2 » Operations & Algebraic Thinking » Work with equal...
- CCSS.Math.Content.2.OA.B.2
Grade 2 » Operations & Algebraic Thinking » Add and subtract...
- CCSS.Math.Content.2.OA.C.3
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900. See related worksheets, workbooks, games, lesson plans. 2.NBT.B.9. Explain why addition and subtraction strategies work, using place value and the properties of operations.
Common Core Math. Grade 2: Operations and Algebraic Thinking. 2.OA.A. Represent and solve problems involving addition and subtraction. 2.OA.A.1. Fully covered.
- Add and subtract within 20. Add within 20: Add and subtract within 20 Add using arrays: Add and subtract within 20 Subtract within 20: Add and subtract within 20.
- Place value. Intro to place value: Place value Numbers in standard, word, and expanded form: Place value Regroup whole numbers: Place value. Comparing 2 and 3 digit numbers: Place value Even and odd numbers: Place value Counting patterns within 1,000: Place value.
- Add and subtract within 100. Visually adding within 100: Add and subtract within 100 Strategies for adding within 100: Add and subtract within 100 Visually subtract within 100: Add and subtract within 100.
- Add and subtract within 1,000. Visually adding within 1,000: Add and subtract within 1,000 Strategies for adding within 1,000: Add and subtract within 1,000 Strategies for subtracting within 1,000: Add and subtract within 1,000.
Ways to make a number using subtraction (2-P.9) Complete the subtraction sentence - up to two digits (2-P.11) Add and subtract numbers - up to 100 (2-Q.1) Which sign (+ or -) makes the number sentence true? - up to 100 (2-Q.3) Ways to make a number using addition and subtraction - up to 100 (2-Q.4)
Grade 2 Overview. Operations and Algebraic Thinking. Represent and solve problems involving addition and subtraction. Add and subtract within 20. Work with equal groups of objects to gain foundations for multiplication. Number and Operations in Base Ten. Understand place value.
Second grade students: How Parents Can Support: How Things Have Changed: Extend understanding of place value to read, write, and compare numbers up to 1000. Have your child skip count by 2’s, 5’s, or 10’s. Play board games that include counting, adding and subtracting such as cards, dominoes, Monopoly, Life or other board games.
