2nd Grade

Unit 5: Addition and Subtraction within 1,000 and with Word Problems to 100

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Select a Lesson Topic A Lesson 1 Day 1 - Relate 10 more, 10 less, 100 more, and 100 less to addition and subtraction of 10 and 100 Topic A Lesson 2 Day 2 - Add and subtract multiples of 100, including counting on to subtract Topic A Lesson 3 Day 3 - Add multiples of 100 and some tens within 1,000 Topic A Lesson 4 Day 4 - Subtract multiples of 100 and some tens within 1,000 Topic A Lesson 5 Day 5 - Use the associative property to make a hundred in one addend Topic A Lesson 6 Day 6 - Use the associative property to subtract from three-digit numbers and verify solutions with addition Topic A Lesson 7 Day 7 - Share and critique solution strategies for varied addition and subtraction problems within 1,000 Topic B Lesson 8 Day 8 - Relate manipulative representations to the addition algorithm Topic B Lesson 9 Day 9 - Relate manipulative representations to the addition algorithm Topic B Lesson 10 Day 10 - Use math drawings to represent additions with up to two compositions and relate drawings to the addition algorithm Topic B Lesson 11 Day 11 - Use math drawings to represent additions with up to two compositions and relate drawings to the addition algorithm Topic B Lesson 12 Day 12 - Choose and explain solution strategies and record with a written addition method Topic C Lesson 13 Day 13 - Relate manipulative representations to the subtraction algorithm, and use addition to explain why the subtraction method works Topic C Lesson 14 Day 14 - Use math drawings to represent subtraction with up to two decomps, relate drawings to the algorithm, and use addition to explain subtraction Topic C Lesson 15 Day 15 - Use math drawings to represent subtraction with up to two decomps, relate drawings to the algorithm, and use addition to explain subtraction Topic C Lesson 16 Day 16 - Subtract from multiples of 100 and from numbers with zero in the tens place Topic C Lesson 17 Day 17 - Subtract from multiples of 100 and from numbers with zero in the tens place Topic C Lesson 18 Day 18 - Apply and explain alternate methods for subtracting from multiples of 100 and from numbers with zero in the tens place Topic D Lesson 19 Day 19 - Choose and explain solution strategies and record with a written addition or subtraction method Topic D Lesson 20 Day 20 - Choose and explain solution strategies and record with a written addition or subtraction method

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