Second Grade is a very important year for developing **addition and subtraction fluency up to 100**. In Unit 3 of the 2nd Grade Math Made Fun Curriculum, we focus on **Addition and Subtraction Up to 100.** Mastery of basic addition and subtraction up to 20 is the foundation for learning addition and subtraction up to 100. Furthermore, mastering facts up to 20 through games, hands-on strategies and lots of practice helps students to build confidence and proficiency. Next, students work to tackle more challenging mathematical computations of addition and subtraction up to 100 through a variety of strategies, models and reasoning.

**In this math unit on Addition up to 100, students will learn to: **

*Use addition and subtraction within 100 to solve one-step and two-step word problems

*Fluently add and subtract within 20 using mental strategies

*Determine whether a group of objects (up to 20) has an odd or even number of members

*Write an equation to express an even number as a sum of two equal addends

*Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction

*Add up to four two-digit numbers using strategies based on place value and properties of operations

*Mentally add 10 to a given number 0-90, and mentally subtract 10 from a given number 10-100

*Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers

*Represent whole-number sums and differences within 100 on a number line diagram

This 2nd Grade Math Made Fun Unit 3 is loaded with **49 hands-0n math centers** and **93 NO PREP/Activity pages! **

### SAVE $$$ WITH THE BUNDLE!

**Here are the 10 Units that will be included in the 2nd Grade: Math Made Fun Curriculum**

**Unit 1:** Number Sense to 1,000

**Unit 2:** Place Value to 1,000

**Unit 3:** Addition and Subtraction Fluency within 100

**Unit 4:** Addition and Subtraction with 2-Digit and 3-Digit Numbers

**Unit 5:** Geometry and Fractions

**Unit 6:** Graphs and Data

**Unit 7:** Time

**Unit 8:** Money

**Unit 9:** Measurement

**Unit 10:** Multiplication and Division

## Each unit includes a **scope** with the** objectives:**

**Daily Lesson Plans** that offer differentiation for on-level, below-level and above-level students.

The lesson plans are broken down into **5 easy-to-follow parts:**

1. **Objective**– What students should be able to do by the end of the lesson.

2. **Review- **A quick warm-up that has students practice previous skills that will be used in the current lesson.

3. **Hook-**A fun intro to get students engaged.

4. **Mini Lesson**– Teach, model, and discuss the new skill in today’s lesson.

5. **Practice- **Each practice section lists three types of activities that pair well with the specific lesson.

**Center(s)- **New center(s) to be introduced with the lesson.

**Activity Pages-** These pages require some basic materials such as scissors, glue or dice.

**Practice Pages- **These only require a pencil and crayons! They are great for table work, homework or work on the go!

✸**Differentiation**– Each lesson include **scaffold** and **extension** ides to meet the needs of students at **all levels**!

**Pre and Post Assessments** for EACH unit!

** Material Wrap Up** Page!

## LET’S LOOK AT THE MATH CENTERS FOR UNIT 3 IN ACTION…

## CENTER NUMBER 1: Fact Fluency Strips (Addition within 20)

Solve the problems. Write the sums using a dry-erase marker. Check your answers on the key.

## CENTER NUMBER 2: Fact Fluency Strips (Subtraction within 20)

Solve the problems. Write the differences using a dry-erase marker. Check your answers on the key.

## CENTER NUMBER 3: Fact Fluency Strips (Addition and Subtraction within 20)

Solve the problems. Write the sums and differences using a dry-erase marker. Check your answers on the key.

## CENTER NUMBER 4: Fact Fluency Addition within 20

Flip a card. Solve the problem and find the matching sum on the board. Record the equation on your recording sheet.

## CENTER NUMBER 5: Fact Fluency Subtraction within 20

Flip a card. Solve the problem and find the matching difference on the board. Record the equation on your recording sheet.

## CENTER NUMBER 6: Fact Fluency Mixed Review within 20

Flip a card. Solve the problem and find the matching sum or difference on the board. Record the equation on your recording sheet.

## CENTER NUMBER 7: Fact Fluency Addition (Adding 3 numbers up to 100)

Flip a card. Solve the problem and find the matching sum on the board. Record the equation on your recording sheet.

## CENTER NUMBER 8: Fact Fluency Addition (Adding 4 numbers up to 100)

Flip a card. Solve the problem and find the matching sum on the board. Record the equation on your recording sheet.

## CENTER NUMBER 9: Roll it and Mentally Solve it (Adding up to 20)

Roll a die. Solve the problems in your head that are in that row. Color a star each time you solve the problems.

## CENTER NUMBER 10: Roll it and Mentally Solve it (Subtraction up to 20)

Roll a die. Solve the problems in your head that are in that row. Color a star each time you solve the problems.

## CENTER NUMBER 11: Roll it and Mentally Solve it (Mixed Review up to 20)

Roll a die. Solve the problems in your head that are in that row. Color a star each time you solve the problems.

## CENTER NUMBER 12: Tic-Tac-Toe Addition (within 100, no regrouping)

Take turns with a friend solving the addition problems. Each player uses a different color to write the answers. The first person to get three in a row wins.

## CENTER NUMBER 13: Tic-Tac-Toe Addition (within 100, with regrouping)

Take turns with a friend solving the addition problems. Each player uses a different color to write the answers. The first person to get three in a row wins.

## CENTER NUMBER 14: Tic-Tac-Toe Subtraction (within 100, no regrouping)

Take turns with a friend solving the subtraction problems. Each player uses a different color to write the answers. The first person to get three in a row wins.

## CENTER NUMBER 15: Tic-Tac-Toe Subtraction (within 100, with regrouping)

Take turns with a friend solving the subtraction problems. Each player uses a different color to write the answers. The first person to get three in a row wins.

## CENTER NUMBER 16: Tic-Tac-Toe (Mixed Review)

Take turns with a friend solving the math problems. Each player uses a different color to write the answers. The first person to get three in a row wins.

## CENTER NUMBER 17: Spin and Solve Addition (within 100, no regrouping)

Spin both spinners. Add the numbers. Record the equation on your recording sheet.

## CENTER NUMBER 18: Spin and Solve Addition (within 100, with regrouping)

Spin both spinners. Add the numbers. Record the equation on your recording sheet.

## CENTER NUMBER 19: Spin and Solve Subtraction (within 100, no regrouping)

Spin both spinners. Subtract the number of spin B from the number of spin A. Record the equation on your recording sheet.

## CENTER NUMBER 20: Spin and Solve (within 100, with regrouping)

Spin both spinners. Subtract the number of spin B from the number of spin A. Record the equation on your recording sheet.

## CENTER NUMBER 21: Ice Cream Addition (within 100, no regrouping)

Flip a card. Solve the addition problem. Record the equation on the recording sheet.

## CENTER NUMBER 22: Ice Cream Addition (within 100, with regrouping)

Flip a card. Solve the addition problem. Record the equation on the recording sheet.

## CENTER NUMBER 23: Word Problems (one-step, up to 20)

Read the word problem. Solve the problem. Show your work on the mat.

## CENTER NUMBER 24: Word Problems (one-step, up to 100 with unknown start, no regrouping)

Read the word problem. Solve the problem. Show your work on the mat.

## CENTER NUMBER 25: Word Problems (one-step, up to 100 with unknown start, with regrouping)

Read the word problem. Solve the problem. Show your work on the mat.

## CENTER NUMBER 26: Word Problems (two-step, up to 100, no regrouping)

Read the word problem. Solve the problem. Show your work on the mat.

## CENTER NUMBER 27: Number Line Word Problems

Read the word problem. Use the number line to solve the problem. Record the question and answer on the recording sheet.

## CENTER NUMBER 28: Spin and Cover

Spin both spinners. Add the numbers and cover the number that matches.

## CENTER NUMBER 29: Roll and Cover

Roll two dice. Add them together. Cover a subtraction problem whose difference is the sum of the dice.

## CENTER NUMBER 30: Open-Ended Addition Number Lines

Use the open-ended number line to solve the addition problem. Record the equation on the recording sheet.

## CENTER NUMBER 31: Open-Ended Subtraction Number Lines

Use the open-ended number line to solve the subtraction problem. Record the equation on the recording sheet.

## CENTER NUMBER 32: Number Line Subtraction

Flip a card. Read the problem. Decide which segments of the number line you need to help you solve the problem. Record your answer on the recording sheet.

## CENTER NUMBER 33: Roll and Add Three 2-Digit Numbers

Roll a die. Solve a problem in that row and cover.

## CENTER NUMBER 34: Fact Fluency- Missing Addends

Complete each equation by filling in the missing addends.

## CENTER NUMBER 35: Fact Fluency- Addition up to 20

Complete each equation by filling in the missing sums.

## CENTER NUMBER 36: Break Apart Addition

Break apart the 2-digit number into tens and ones. Write the new addition problem and solve.

## CENTER NUMBER 37: Bubble Number Mix-Up (Adding a 2-digit and 1-digit number, no regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 38: Bubble Number Mix-Up (Adding two 2-digit numbers, no regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 39: Bubble Number Mix-Up (Adding a 2-digit and 1-digit number, with regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 40: Bubble Number Mix-Up (Adding two 2-digit numbers, with regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 41: Bubble Number Mix-Up (Subtracting a 1-digit number from a 2-digit number, no regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 42: Bubble Number Mix-Up (Subtracting a 2-digit number from a 2-digit number, no regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 43: Bubble Number Mix-Up (Subtracting a 1-digit number from a 2-digit number, with regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 44: Bubble Number Mix-Up (Subtracting a 2-digit number from a 2-digit number, with regrouping)

Look at the numbers that are on the bubbles. Arrange them in the boxes so that the equation is true.

## CENTER NUMBER 45: Honey Comb Addition

Add two numbers that are touching each other on the honey comb. Write their sum in the empty hexagon above them.

## CENTER NUMBER 46: Math Puzzle (Adding and Subtracting up to 20)

Starting in the upper left corner, work your way around the puzzle. Add or Subtract the given numbers. Record the final number on the recording sheet.

## CENTER NUMBER 47: Place Value Addition (with three 2-digit numbers)

Flip a card. Use strategies based on place value and properties of operations to solve.

## CENTER NUMBER 48: Place Value Addition (with four 2-digit numbers)

Flip a card. Use strategies based on place value and properties of operations to solve.

## CENTER NUMBER 49: Even and Odd Numbers

Flip a card. Read the word problem. Answer the question. Record your answer on the recording sheet.

For each page, there is a grade level standard attached so you know **EXACTLY** what you are covering! You can feel confident that **ALL** the standards for Second Grade are being covered!

## HOW DO I ORGANIZE THE UNITS?

I chose to store the math centers in Sterilite bins, because they don’t take up too much space. It is a tight fit, but I find that they work nicely for me. However, if you choose, you could store the centers in a larger container as well. Within the bin, each math center is stored in a gallon sized ziplock baggie. Since Unit 3 has 49 math centers, I found it helpful to split up the centers into 2 bins.

You can purchase Unit 3 individually HERE or

**SAVE BIG WITH THE BUNDLE HERE**

Amanda says

Hi There! I LOVE your products! I just purchased your growing math bundle and I was wondering what your time line was for completing the other units? Does this usually take a few weeks or months? Just wondering when I might expect the additional units?

Thank you!

Amanda Hartl

amoffatt says

Hi Amanda!

I’ve been working on getting the units out as quickly as possible, but I hesitate to give a specific time frame, because I really don’t know exactly how long it will take because of all of the standards covered for 2nd Grade. My goal has been to get out one unit every 2 weeks. However, some of the units have taken up to a month to complete. I try to make sure that they are full and complete with assessments and lesson plans, aligned with each grade level standard, with plenty of practice to give students the opportunity to fully master the concepts. I hope that answers your question.

Kindly,

Annie