EAST ALLEN COUNTY SCHOOLS

Bundle 4

Grade 2

Math

Big Idea: Connections Subtraction (with and

without regrouping)

Enduring Understandings Essential Questions Every subtraction fact has a related addition fact.

The inverse relationship between addition and subtraction can be used to check our answers. We sometimes need to regroup from the next greater place value in order to subtract. Patterns help make predictions and solve problems.

The result of subtraction is called the difference.

What is the relationship between addition and subtraction?

In what ways do we solve addition and subtraction problems? How do we decide if the difference is reasonable?

How are patterns useful when solving problems?

CC/Learning Targets Core Vocabulary Links to Technology 2.2.3 2.2.4 2.2.5 2.3.1 2.3.3

2.3.4 2.6.1 – 2.6.5 2.NBT.9

inverse relationship

My Math Flashcards (app)

Flash to Pass (app) (all operations) Rocket Math Conundra Math (app) (all operations- challenging) 123 Tracer Free (app)

Bundle Performance Task(s) Provide each student with a blank BINGO board, marker chips, and answer cut-out. Students will cut out answers and glue them randomly on their BINGO board. As an alternative, display the numbers on the SMART Board and have the students randomly copy them on their BINGO board. Read aloud a subtraction number sentence to the students. The students will write and solve the number sentence on a sheet of paper. They will check their answer by solving the inverse addition problem. They will find the correct answer on their BINGO sheet and cover it with a marker chip. Repeat this process until a student gets a BINGO. As an extension, the teacher can lead the game with a small group of students. The teacher will create real-life problems involving addition or subtraction using the numbers on the performance sheet. Students will choose the correct operation, solve, and check their answer. They will then find the correct answer on their BINGO sheet. Students may also work in partners to create their own BINGO game as outlined above. They will create their own addition and subtraction problems making sure their answers are correct by using the inverse property before playing. Students will share their game by playing with other classmates.

See performance task template at the end of the bundle.

Grade 2 Math Bundle 4

Quarter 2 Nov-Dec

Recommended Read-Alouds G2 - Bundle 4

Big Idea: Connections Title Author Relates to…

Grapes of Math Greg Tang Addition and Subtraction Problems

Greater Estimations Bruce Goldstone Estimation

If You Were a Minus Sign Trisha Shaskan Subtraction Shark Swimathon Stuart J. Murphy Subtraction

Subtraction Action Loreen Leedy Subtraction

Math G2 - Bundle 4

CC/Learning Targets Resource of Ideas Evidence of Learning 2.2.3 (2.OA.1) (2.NBT.5) (2.NBT.6) (2.NBT.7)

Subtract two whole numbers less than 1000 with and without regrouping. a. Subtract two whole numbers less than 1000 without regrouping. b. Subtract two whole numbers less than 1000 with regrouping.

- Five Easy Steps to a Balanced Math Program for Primary Grades pp. 3- 23, 141-144, 162-166, 209-211 - If You Were a Minus Sign by Trisha Shaskan - Shark Swimathon by Stuart J. Murphy

- Subtraction Games - Subtracting 2-Digit Numbers - Study Zone Activities - Number Nut Subtraction Activities - Math-tastic Subtraction App - Dino Teach App - enVisionMATH Lessons 1.3 - 1.7 Lessons 3.1 - 3.5 Lessons 7.3 – 7.4 - Houghton Mifflin Math Lessons 3.1 - 3.4, 3.8 Lessons 12.2, - 12.6 Lessons 13.1 - 13.5

- enVisionMATH pp. 33-34, 97-98 - Houghton Mifflin Math pp. 73-74, 343-344, 365-366 - How-to-Poster - Daily Math Review

2.2.4 (2.NBT.5) (2.NBT.7) (2.OA.2)

Understand and use the inverse relationship between addition and subtraction. a. Show the inverse relationship between addition and subtraction. This learning is closely related to fact families practiced in first grade. Ex: 89-17=72 relates to 72+17=89

- Five Easy Steps to a Balanced Math Program for Primary Grades pp. 3- 23, 141-144, 162-166, 209-211 - BBC Missing Number Game - Subtraction Activities- 1 - Addition and Subtraction Idea Bank - Inverse +/- Practice- Scroll to Bottom - enVisionMATH

- enVisionMATH pp. 33-34 - Inverse Match Game - Thinking Map/Graphic Organizer - Class Game of I Have, Who Has?

Math G2 - Bundle 4

b. Describe the inverse relationship between addition and subtraction. c. Apply understanding of inverse relationships to determine if an addition or subtraction answer is valid.

Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

Lesson 1.6 Lessons 3.2 - 3.4 Lesson 9.7 - Houghton Mifflin Math Lesson 3.4 Lesson 13.5 Lesson 22.4

2.2.5 (2.NBT.6)

Use estimation to decide whether answers are reasonable in addition and subtraction problems.

a. Explain what estimation means. b. Decide whether answers for addition problems are reasonable by using estimation.

- Greater Estimations by Bruce Goldstone - Math Activities Based on State Standards - Estimation - Watch.Know.Learn Free Videos - Houghton Mifflin Math Lesson 13.1

- Houghton Mifflin Math pp. 365-366 - Math Journal

2.3.1 (2.OA.1)

Relate problem situations to number sentences involving addition and subtraction.

a. Select whether an addition or subtraction number sentence fits a given problem situation.

b. Write an addition number sentence for

- Grapes of Math by Greg Tang - Study Zone Activities - BBC Missing Number Game - enVisionMATH Lessons 3.1 – 3.4, 3.6 Lesson 4.4 Lesson 7.5 Lesson 8.9

- enVisionMATH pp. 97-98, 209-210, 293-294 - Houghton Mifflin Math pp. 73-74 - Think-Pair-Share

Math G2 - Bundle 4

a given problem situation. c. Write a subtraction number sentence for a given problem situation.

Lesson 9.9 - Houghton Mifflin Math Lessons 3.5, 3.7

2.3.3 Recognize and extend a linear pattern by its rules. a. Describe the rule for a given linear pattern. Ex: One horse has 4 legs; two horses have 8 legs, and so on. Continue the pattern to find how many legs 5 horses have. b. Apply the rule to extend a linear pattern. Ex: One horse has 4 legs; two horses have 8 legs, and so on. Continue the pattern to find how many legs 5 horses have.

- Virtual Manipulatives - Study Zone Activities - Fun Brain Next Number - BBC Number Patterns - enVisionMATH Lesson 6.6 Lessons 10.5, 10.9 - Houghton Mifflin Math Lessons 6.2, 6.5

- enVisionMATH pp. 183-184, 335-336 - Houghton Mifflin Math pp. 161-162 - Thinking Map/ Graphic Organizer

2.3.4 Create, describe, and extend number patterns using addition and subtraction. a. Describe the rule for a given addition number pattern.

b. Extend number patterns using addition.

c. Create number patterns using addition.

- Virtual Manipulatives - Study Zone Activities - Fun Brain Next Number - BBC Number Patterns - enVisionMATH Lessons 4.1 - 4.3 - Houghton Mifflin Math Lesson 6.2

- enVisionMATH pp. 119-120 - Houghton Mifflin Math pp. 161-162 - Daily Math Review

Math G2 - Bundle 4

d. Describe the rule for a given subtraction number pattern. e. Extend number patterns using subtraction. f. Create number patterns using subtraction.

2.6.1 – 2.6.5

Problem Solving

- Five Easy Steps to a Balanced Math Program for Primary Grades pp. 31-57, 146-147, 170-174, 212-214 - The Problem Solver 2: Activities for Learning Problem Solving Strategies - Problem Solving Ideas - Study Zone Problem Solving - Education Place Problem Solving - enVisionMATH Lesson 3.6 Lesson 7.5 Lesson 9.9 - Houghton Mifflin Math Lesson 6.6 Lesson 12.7 Lesson 13.6 Lesson 22.6

- Problem Solver Activities - Group Problem Solving - Think-Pair-Share - See Problem Solving Template in Appendix

2.NBT.9 Explain why addition and subtraction strategies work, using place value and the properties of operations.

- enVisionMATH Lessons 11.3, 11.7

- enVisionMATH pp. 377-378

Correlating Learning Targets Teacher Notes

Math G2 - Bundle 4

2.1.8 2.1.9 2.1.10 2.2.2 2.2.6

2.5.9 2.5.10 2.B.1 2.G.2 2.G.3

- Five Easy Steps to a Balanced Math Program for Primary Grades pp. 59-84, 148-150, 174-179 - IDOE Resources

To access enVisionMATH materials for 2006 Indiana State Standards: www.pearsonsuccessnet.com username: envisionindiana password: 123456

Name ____________________________________

Bundle 3 Performance Task Subtraction

Cut out the numbers and glue them to the BINGO board in any order.

128 23 122

305 316 42

319 236 127

Read the following subtraction number sentences aloud during the BINGO game. Students should solve the number sentences on the performance sheet and find the answers on the BINGO board.

254-126=128

165-42=123

70-48=22

433-128=305

541-225=316

87-45=42

667-348=319

250-14=236

192-65=127