Looking for a 3rd grade math workbook that your child can actually follow on their own? Grade 3 Math Mastery, Volume 1 takes children step by step through the first half of third grade math, from place value to fractions, with clear lessons, plenty of practice, and puzzles that make kids want to keep going.

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What’s inside this 3rd grade math workbook
- 55 step-by-step lessons across 6 units
- 750+ practice problems with room to show work
- 18 pages of Looby’s Camp puzzles: code breakers, mazes, word searches, and number puzzles
- A unit review and a scored Unit Check for every unit
- Complete answer keys, with scoring guides for written answers
- A My Math Words glossary, a multiplication table, and fraction strips
- A certificate of completion for the finish line
What your child will learn (Units 1–6)
- Unit 1: Place Value and Number Sense (7 lessons): numbers to 10,000, place value and expanded form, comparing, rounding to the nearest ten and hundred, and number patterns
- Unit 2: Addition and Subtraction (9 lessons): adding and subtracting within 1,000 with regrouping, estimating, checking with inverse operations, and word problems
- Unit 3: Multiplication (11 lessons): equal groups, arrays, number lines, multiplication properties, facts from 0 to 10, missing factors, and word problems
- Unit 4: Division (9 lessons): equal sharing, arrays, number lines, fact families, and how division connects to multiplication
- Unit 5: Multiplication, Division, and Problem Solving (9 lessons): choosing the operation, two-step word problems, writing equations, unknown numbers, and patterns
- Unit 6: Understanding Fractions (10 lessons): unit fractions, fractions of a shape and of a set, fractions on a number line, and fractions greater than one
Every lesson follows the same simple plan
Children learn best when they know what comes next. Every lesson in the workbook uses the same five steps:
- Learn It: a short explanation with a worked example
- Try It: guided problems with hints
- Practice: uncrowded pages with room to show work
- Test Ready: test-style multiple-choice questions
- Explain It: a written question that builds math reasoning
Because the routine never changes, children can work more independently, and parents can see at a glance where help is needed.

Math practice that feels like an adventure
Your child travels with Looby the Number Explorer, a friendly fox, across six lands of an adventure map, from Place Value Peaks to Fraction Forest. After each lesson, they color a paw print on the map. Every unit ends with a Help Looby! mission and Looby’s Camp puzzle pages, so review time feels like a reward.
Who is this workbook for?
- Parents who want simple, structured homework help at home
- Homeschool families looking for a complete first-half-of-the-year math program
- Teachers and tutors who need extra practice, small-group work, or intervention pages
- Summer review, before third grade starts or before fourth grade
The workbook covers the core third grade math skills taught in classrooms across the United States. It also follows the New York State Next Generation Mathematics Learning Standards, so families in New York get practice that matches the order schools teach.
Tips for using the workbook at home
- Aim for 15 to 20 minutes a day. A lesson can be split over two short sittings.
- Read the Learn It box together, then let your child try the Try It problems first.
- Check answers with the answer key right away, so mistakes are fixed while the lesson is fresh.
- Use the Unit Check score to decide whether to review a unit or move on.
- Celebrate progress: coloring the paw prints on the adventure map is part of the fun.
Frequently asked questions
Is this workbook only for New York students?
No. It covers the core third grade skills taught across the United States. It follows the New York State standards, which makes it especially helpful for New York families.
Does the workbook include answers?
Yes. Complete answer keys are at the back of the book, with scoring guides for the written-answer questions.
What age is it for?
It is written for third graders, usually ages 8 to 9. It also works well for review before fourth grade or for extra practice with an older child.
Is the inside printed in color?
The cover is in full color. The pages inside are printed in black and white, which keeps the price low and makes the puzzle pages easy to color.
Which volume should we start with?
Start with Volume 1 (Units 1–6). Volume 2 continues with Units 7–12 and ends with three full practice tests.

