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Addition and Subtraction Strategies

Free math video lessons with examples and worked solutions to help to help Grade 2 students learn how to choose and explain solution strategies and record with a written addition or subtraction method.


Common Core Standards: 2.NBT.7, 2.NBT.8, 2.NBT.9

New York State Common Core Math Module 5, Grade 2, Lesson 19, Lesson 20

Topic C: Strategies for Decomposing Tens and Hundreds Within 1,000

NYS Math Module 5 Grade 2 Lesson 19

Lesson 19 Homework

1. Solve and explain why you chose that strategy.
c. 519 + 342 = ______
f. 904 – 395 = ______

Lesson 20 Homework

1. Solve each problem using two different strategies.
a. 456 + 244 = _________
b. 698 + ______ = 945

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