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Enough for the Grade?: Pencils and Erasers
Write an equation. Solve each problem. Show your work.
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1 South Side School has 2 second grades.
There are 30 students in Class A.
There are 7 fewer students in Class B.
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a. How many students are in Class B?
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b. The school principal has 100 pencils. If he gives one to every second grader, how many will he have left?
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Table of Contents
Investigations 3 in Number, Data, and Space®, Student Activity Book
Unit 1 Coins, Number Strings, and Story Problems
Investigation 1
Investigation 2
Investigation 3
Investigation 4
Unit 2 Attributes of Shapes and Parts of a Whole
- Today's Number with 10 Cubes
- 10 Cubes
- About the Mathematics in This Unit
- Ways to Fill: Shape A
- Ways to Fill: Shape B
- Ways to Fill: Shape C
- Ways to Fill: Shape D
- Ways to Fill: Shape E
- Ways to Fill: Shape F
- Today's Number: 10
- Arranging 10 Objects
- About Mathematics Homework
- Exploring Money
- Today's Number: 12
- Missing Numbers 1
- Missing Numbers 2
- Missing Numbers 3
- Missing Numbers 4
- Missing Numbers 5
- Missing Numbers 6
- Counting Strips
- Coins
- What Went Wrong?
Investigation 1
Investigation 2
Investigation 3
Unit 3 How Many Stickers? How Many Cents?
- Linda and Ebony Share Everything
- How Many?
- Build the GeoBlock
- How Many Halves?
- Halves and Not Halves of Rectangles
- Halves on Geoboards
- Halves and Not Halves
- Today's Number: 29
- Circles: Half-and-Half
- Fraction Flags
- Matching Fractions
- Different Shapes: Halves and Fourths
- More Fractions
- Color Them In!
- Matching Fractions 2
- Pizza Fractions
- Fractions All Around Us
Investigation 1
Investigation 2
Investigation 3
Unit 4 Pockets, Teeth, and Guess My Rule
- Practicing the Facts
- How Many Stickers?
- How Many Stickers?
- About the Mathematics in This Unit
- 46 Stickers
- 53 Stickers
- How Many Stickers? 2
- Dimes and Pennies: How Many of Each?
- Strips and Singles: How Many of Each?
- Problems about Money
- How Many Cubes?
- Kira's Sticker Book
- How Many More?
- More Pages in Kira's Sticker Book
- How Many of Each?
- Solving a Sticker Problem
- How Many More?
- Story Problems about Roll-a-Square
- Roll-a-Square Problems
- More Roll-a-Square Problems
- Scores in Close to 20
- Close to 20 Problems
- Close to 20 Recording Sheet
- Close to 20 Directions
- Sticker Problems
- Soccer Stickers
- The Clock
- More Sticker Problems
- Cat Stickers
- Get To 100
- Story Problems about Stickers
- Time: Hours and Half Hours
- Did They Get To 100?
- Counting Coins
- Related Activities to Try at Home
- Do You Have $1.00?
- Sticker Problems at Home
- How Many Stickers?
- Today's Number: 56 with Coins
- Problems with an Unknown Change
- How Many Balloons?
- How Many Sheets? How Many Stickers?
- Sticker Problems
- Groups of 10
- Fish Stickers
- Problems with an Unknown Start
- How Many Balloons? 2
- Missing Numbers: Equations on the 100 Chart
- Missing Numbers: Equations on the 200 Chart
- Missing Numbers: Equations on the 300 Chart
- Missing Numbers: Equations on the 400 Chart
- Missing Numbers: Equations on the 500 Chart
- Plus or Minus 10
- Star Stickers
- Missing Numbers: Equations on the 100 Chart 2
- Missing Numbers: Equations on the 200 Chart 2
- Missing Numbers: Equations on the 300 Chart 2
- Missing Numbers: Equations on the 400 Chart 2
- Missing Numbers: Equations on the 500 Chart 2
- What Time Is It?
- Today's Number: 12 with Missing Parts
Investigation 1
Investigation 2
Unit 5 How Many Tens? How Many Hundreds?
- How Many Pockets?
- Guess My Rule Story Problems
- About the Mathematics in This Unit
- Today's Number: 12
- Guess My Rule with Letters
- Striped Shirts
- Related Activities to Try at Home
- How Many Flowers?
- Guess My Rule at Home
- Circle for Guess My Rule
- Venn Diagram for Guess My Rule
- Weekend Activity Data
- Favorite Sports
- Guess Both of My Rules!
- Today's Number: 20
- Pocket Data from Our Class
- Zoo Animals
- How Many Pockets in All?
- Our Plan for Collecting Data
- Looking at a Line Plot
- How Many Teeth?
- Looking at a Line Plot 2
- Practicing the Facts
- What Did You Find Out?
- Explaining Someone Else's Findings
- Looking at a Line Plot 3
- How Many Pockets? 2
- Mystery Teeth Data: Which Class Is It?
- Mystery Teeth Data: Which Class Is It? Recording Sheet
- Representing Data
- Today's Number: 18
- Coin Problems
Investigation 1
Investigation 2
Investigation 3
Unit 6 How Far Can You Jump?
- Plus 9 or Minus 9 Bingo Problems
- About the Mathematics in This Unit
- Capture 5 Problems
- How Many Stickers? How Many More to 100?
- How Many More?
- Plus 9 or Minus 9 Bingo Gameboard
- Plus 9 or Minus 9 Bingo Directions
- Ways to Make a Dollar
- Today's Number with Coins
- How Many More to 100? How Much More to $1.00?
- Problems for Capture 5
- Writing Equations for Capture 5
- Telling Time
- Practicing the Facts
- Today's Number: 100
- Sums That Equal 100
- How Many Pockets?
- How Many Stickers?
- Comparing Stickers
- How Many Stickers? 2
- How Many Stickers?
- Problems for Close to 100
- Find the Number
- Plus or Minus 10, Plus or Minus 100
- Find the Number 2
- Today's Number: Guess the Number
- 3-Digit Numbers
- Related Activities to Try at Home
- Addition Problems, Set 1
- Addition Problems, Set 2
- What Time Is It?
- Addition at Home
- Comparison and Addition Problems
- Counting by 5s
- Comparison and Addition Problems 2
- Fact Practice
- More Than/Fewer Than Problems
- Solving Problems by Adding Tens and Ones
- Comparison and Addition Problems 3
- Going to the Movies
- Solving Problems by Adding On in Parts
- Comparison and Addition Problems 4
- Counting by 5s and 10s Again!
- Prize Tickets
- Today's Number: 200
- Enough for the Grade?: Bean Bags
- Enough for the Grade?: Cupcakes
- Stickers in 4 Groups
- How Many Pockets?
- Enough for the Grade?: Pencils
- Enough for the Grade?: Ice Pops
- Plus 9 or Minus 9 Bingo Problems
- Today's Number: Guess the Number
Investigation 1
Investigation 2
Unit 7 Partners, Teams, and Other Groups
- How Far Can You Jump?
- Time to the Quarter Hour
- About the Mathematics in This Unit
- Comparing Jumps
- Measuring with Pencils
- Measuring Jumps with Cubes
- A Jumping Contest
- How Much Longer?
- Jumping in the Land of Inch
- Bullfrog Jumps
- Measuring with Inch-Bricks at Home
- Clothes in the Land of Inch
- Buildings in the Land of Inch
- Inch-Brick Tool Measurements
- Practicing the Facts
- Grasshopper Jumps
- Related Activities to Try at Home
- Rulers and Inch-Brick Measuring Tools
- Body Benchmarks
- Measure and Compare
- Inch-Brick Tool Measurements 2
- Comparing Measurements
- Measuring Our Classroom
- Measuring Jumps in Inches
- Room Comparisons
- Length and Width
- Metric Scavenger Hunt
- Inches and Centimeters: Comparing Tools
- Metric Measurements
- Metric Scavenger Hunt at Home
- Measuring Jumps in Centimeters
- Rabbit Jumps
- Inches and Centimeters: Measuring
- Jumps in Centimeters
- More Practicing the Facts
- Cat Comparisons
Investigation 1
Investigation 2
Unit 8 Enough for the Class? Enough for the Grade?
- Partners and Teams
- How Many Pockets?
- Problems about Partners and Teams
- About the Mathematics in This Unit
- Every Hour on the Hour
- Linda and Ebony Share
- Questions about Even and Odd Numbers
- Odd or Even?
- Practicing the Facts
- Bunches of Balloons
- Sharing Pennies
- How Many Flowers?
- Partners and Teams in Grade 2
- A Cube Building
- Close to 100
- Related Activities to Try at Home
- Cube Buildings 1
- Cube Buildings 2
- Today's Number: 50
- Cube Buildings 3
- Cube Buildings 4
- 5 Rooms on a Floor
- Counting by Groups
- Pairs of Socks
- Floor Plan 1
- Floor Plan 2
- Floor Plan 3
- Floor Plan 4
- Floor Plan 5
- Telling Time
- Covering Hexagons
- Mystery Shape 1
- Mystery Shape 2
- Mystery Shape 3
- Mystery Shape 4
- Mystery Shape 5
- Mystery Shape 6
- Mystery Shape 7
- Mystery Shape 8
- Cube Buildings
- Practice with Arrays
- How Do You Get to 100?
Investigation 1
Investigation 2
- Story Problems about Comparing
- What Time Is It?
- About the Mathematics in This Unit
- Story Problems about Comparing 2
- Story Problems about Comparing
- Story Problems about Comparing 3
- What's a Clue?
- Paper Clips
- What Time Is It? 2
- Enough for the Grade?: Pencils and Erasers
- Story Problems about Comparing 2
- Enough for the Grade?: Crayons and Pencil Cases
- The Missing Fruit Mystery
- Pennies and Paper Clips
- Story Problems
- Matching Times to Pictures
- Story Problems 2
- How Many Stickers?
- Pennies and Stickers
- Picking Blueberries
- Stickers to Share
- Paper Clip Problems
- Frog Stickers
- Combining Sets of Stickers
- Hundreds, Tens, and Ones
- Related Activities to Try at Home
- Hundreds of Pencils and Stickers
- Combining Sets of Stickers
- Enough Pencils for the Grade?
- Matching Facts
- Combining Sets of Stickers
- Combining Stickers and Enough for the Grade?
- How Many Stickers?
- Enough for the Grades?
- Matching Facts 2
- Cover Up at Home
- Subtracting Groups of Stickers
- How Many Baseball Stickers?
- More Sticker Problems
- How Many Sailboat Stickers?
- How Many Stickers?
- How Many Stickers?
- Jake's Stickers
- Today's Number: 500
- Today's Number: Guess the Number