Curriculum Library

Grade 2 Unit 8: Adding and Subtracting with Hundreds

Key Concept: When adding or subtracting three-digit numbers sometimes it is necessary to regroup a quantity.

Lesson Sequences

2.8-1-1 Use Base Ten Blocks to Add and Regroup to 500  |
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students use Base 10 blocks to add quantities to 500 with regrouping. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
2.8-1-2 Use Base Ten Blocks to Add and Regroup Two Times to 500  |
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students use Base 10 blocks to add quantities to 500 with regrouping in multiple place values.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
2.8-1-3 Use Base Ten Blocks to Subtract and Regroup to 500  |
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students use Base 10 blocks to subtract quantities within 500 with regrouping. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
2.8-1-4 Use Base Ten Blocks to Subtract and Regroup Two Times to 500  |
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students use Base 10 blocks to subtract quantities within 500 with regrouping in multiple place values.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
2.8-1-5 Use an Open Number Line to Add and Subtract Within 500  |
View Teacher-Facilitated Lesson Students use an open number line to add and subtract quantities to 500 with regrouping.  (35-45 min)
2.8-1-6 Relate Addition and Subtraction on an Open Number Line to 500  |
Lesson Plan
View Teacher-Facilitated Lesson Students relate addition and subtraction on an open number line with quantities within 500. (35-45 min)
Key Concept: Word problems can involve multiple steps in order to solve.

Lesson Sequences

2.8-2-1 One-Step Word Problems  |
Lesson Plan
View Teacher-Facilitated Lesson Students solve join, separate, part-part-whole, and comparison word problems with unknowns in various positions. (35-45 min)
2.8-2-2 Two-Step Word Problems to 100: Part 1  |
Lesson Plan
View Teacher-Facilitated Lesson Students use multiple strategies to solve two-step problems involving quantities to 100.  (35-45 min)
2.8-2-3 Two-Step Word Problems to 100: Part 2  |
Lesson Plan
View Teacher-Facilitated Lesson Students use multiple strategies to solve more challenging two-step problems involving quantities to 100. (35-45 min)
2.8-2-4 Solve Word Problems with Money  |
Lesson Plan
View Teacher-Facilitated Lesson Students apply their understanding of the value of coins and bills in order to solve problems.  (35-45 min)
Key Concept: Place value units can be added and subtracted based on the quantity of each unit.

Lesson Sequences

2.8-3-1 Add and Subtract Multiples of 10  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students add and subtract multiples of ten using Base 10 blocks and a number chart. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
2.8-3-2 Add and Subtract Multiples of 100  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students apply their understanding of adding and subtracting multiples of ten in order to add and subtract multiples of hundreds. (12-20 min)
View Lesson Closer Connect-It (5-8 min)
2.8-3-3 Add and Subtract Multiples of 10 and 100  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students continue to build their understanding of adding and subtracting units. (12-20 min)
View Lesson Closer Connect-It (5-8 min)
2.8-3-4 Mentally Add and Subtract Units of Tens or Hundreds  |
Lesson Plan
View Teacher-Facilitated Lesson Students extend their understanding of adding and subtracting place value units in order to mentally add and subtract units. (35-45 min)
Key Concept: When adding or subtracting three-digit numbers sometimes it is necessary to regroup a quantity.

Lesson Sequences

2.8-4-1 Use Base Ten Blocks to Add/Subtract/Regroup Within 1000  |
Lesson Plan
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students use Base 10 blocks to add and subtract quantities within 1000 with regrouping. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
2.8-4-2 Use Base Ten Blocks to Add/Subtract/Regroup Two Times Within 1000  |
Lesson Plan
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students use Base 10 blocks to add and subtract quantities within 1000 with regrouping in multiple place values. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
2.8-4-3 Use an Open Number Line to Add and Subtract Within 1000  |
Lesson Plan
View Teacher-Facilitated Lesson Students use an open number line to add and subtract quantities within 1000 with regrouping. (35-45 min)
2.8-4-4 Relate Addition and Subtraction on an Open Number Line to 1000  |
Lesson Plan
View Teacher-Facilitated Lesson Students relate addition and subtraction within 1000 using an open number line. (35-45 min)
Key Concept: Word problems can involve multiple steps in order to solve.

Lesson Sequences

2.8-5-1 One- and Two-Step Word Problems: Part 1  |
Lesson Plan
View Teacher-Facilitated Lesson Students identify whether a problem requires one or two steps in order to solve. (35-45 min)
2.8-5-2 One- and Two-Step Word Problems: Part 2  |
Lesson Plan
View Teacher-Facilitated Lesson Students solve one and two step word problems. (35-45 min)
2.8-5-3 One- and Two-Step Word Problems: Part 3  |
Lesson Plan
View Teacher-Facilitated Lesson Students create and solve one and two step word problems. (35-45 min)