Forward
The main areas of study in DarTutors Grade 3 are:
1. Students develop an understanding of multiplication and division of whole numbers through problems involving equal-sized groups, arrays, and area models. They learn the relationship between multiplication and division and solve many word problems involving multiplication and division (chapters 2, 3, and 9).
2. Students develop an understanding of fractions, beginning with unit fractions. They compare fractions by using visual models and strategies based on noticing equal numerators or denominators (chapter 10).
3. Students learn the concepts of area and perimeter. They relate area to multiplication and to addition, recognize perimeter as a linear measure (in contrast with the area), and solve problems involving area and perimeter (chapter 7).
4. Students fluently add and subtract within 1,000, both mentally and in columns. They also learn to add and subtract 4-digit numbers and use addition and subtraction in problem-solving in many contexts, such as with money, time, and geometry.
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Chapter 1: Addition and Subtraction
Chapter 2: Multiplication Concept
Chapter 3: Multiplication Tables
Chapter 4: Telling Time
Chapter 5: Money
Chapter 6: Place Value with Thousands
Chapter 7: Geometry
Chapter 8: Measuring
Chapter 9: Division
Chapter 10: Fractions
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Content
Chapter 1: Addition and Subtraction
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Lessons in this chapter
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Mental Addition ....................
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Review: Mental Subtraction ...
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More Mental Subtraction ........
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Ordinal Numbers and Roman Numerals ..
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More Mental Addition .........
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Mental Subtraction with Three-Digit Numbers ..
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Regrouping in Addition ...........
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Review: Regrouping in Subtraction ....
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Regrouping Twice in Subtraction .........
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Regrouping Twice in Subtraction, Part 2 ...
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Regrouping with Zero Tens .......
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Regrouping with Zero Tens, Part 2 ..
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Rounding 2-Digit Numbers to the Nearest Ten ...
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Rounding 3-Digit Numbers to the Nearest Ten ...
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The Connection with Addition and Subtraction ...
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Mileage Chart .....
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Order of Operations .......
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Graphs ....
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MENTAL MATH
Puzzle Worksheets
This site offers printable number grid puzzle worksheets in three difficulty levels: easy, moderate, and hardest. The “hardest” are actually the best ones — the “easy” ones may be too easy for this level. The puzzles practice mental addition and subtraction within 100.
Callum's Addition Pyramid
Add the pairs of numbers to get a number on the next level and finally the top number.
Three difficulty levels.
Random Coins
Can you make $1.00 from Random Coins? Drag and drop the coins.
Math Mahjong Subtraction
Play a mahjong game—subtraction version.
Monkey Drive Subtraction Up to 25
Drive through the barrels with numbers whose difference matches the number on your car.
Puzzle Pics Subtraction
Click the tile with the right answer and a secret picture is revealed.
REGROUPING
Mr. Martini's Classroom: Long Addition
Practice regrouping in addition online. Click the x's to set the number of digits in the problems.
Tic Tac Toe Addition
Solve three-digit addition problems while playing tic-tac-toe.
Subtraction by Splitting
Subtract numbers by “splitting” them—this shows how regrouping works. Choose the medium or advanced level.
3-Digit Subtraction with Regrouping
Solve 3-digit subtraction problems with step-by-step guidance.
Bowling Game
Solve 10 subtraction problems. After each problem, you get to bowl.
Triple-Digit Subtraction Card Game
An easy card game with several variations to practice double and triple-digit subtraction.
How Close Can You Get?
See how close you can get to the target number in this fun subtraction card game for the whole family.
ROMAN NUMERALS
Roman Numerals Game
Arrange the letters to make the Roman numeral that matches the given number, and repair broken columns.
Concentration — Roman Numerals
Practice Roman numerals from 1 to 100 with this simple concentration game.
Roman Numerals Tutorial
Simple explanations of how numbers are formed using Roman numerals, such as when to “add” or “subtract” the symbols. The student can self-check his/her understanding.
Roman Numerals
A set of web pages where you can learn all about Roman numerals: how they originated, how to read and write the numerals, and where the Roman number system is used today.
ROUNDING
Rounding with a Roller Coaster
This video presents the concept of rounding to the nearest ten in a neat and easy way, using an illustration involving a roller coaster.
Left Turn Otto Rounding
Move Otto the bear to get the numbers that round to the number displayed on top of the screen.
Math Balloons Round the Numbers
Make sets of three balloons that match in color by answering true/false rounding questions.
Rounding Numbers Slot Machine Game
Answer rounding questions correctly, and you get to play the slot machine.
CHARTS, GRAPHS, AND MISC.
Thinking Blocks
Thinking Blocks is an interactive math tool that lets students build diagrams similar to the bar diagrams used in this chapter. Choose the Addition and Subtraction section.
Mileage Charts
This is a lesson about mileage charts with interactive exercises.
Bar Graph — Favorite Colors
Answer multiple-choice questions about bar charts.
Graph Problems Quiz
A 10-question quiz with a variety of word problems and plotting questions.