Grades 3 to 4 ยท 10 lessons
Multiplication and division
A free multiplication and division course for grades 3 and 4. Ten lessons with arrays, groups and number lines, worked examples, practice questions and puzzles.
Each lesson has one idea, one worked example, practice questions and one puzzle. Work through the list in order, or jump to the lesson you need. Every lesson has a matching practice page with ten more questions and answers.
All ten lessons are ready. Start with lesson 1, and use the practice page after each lesson to check that the idea has sunk in.
Lessons
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What multiplication means
Equal groups and repeated addition, with factors and a product.
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Arrays and the commutative property
Rows and columns, and why the order does not change the answer.
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Times tables strategies
Doubles, near facts and the nines, without rote chanting.
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Multiplying by 10 and 100
Move the digits and watch the zeros grow.
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Multiply two-digit by one-digit
Split the number into tens and ones.
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What division means
Sharing equally and making equal groups.
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Division facts and fact families
Every times fact hides two division facts.
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Division with remainders
When the groups do not come out even.
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Word problems: choose the operation
Decide between multiplying and dividing.
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Check with inverse operations
Use multiplication to check division, and the other way round.
What you will learn
The course starts with equal groups, arrays and the turn-around rule. Next come the times tables strategies, multiplying by 10 and 100, and multiplying a two-digit number by a one-digit number. The second half turns multiplication around: sharing and grouping, division facts and fact families, remainders, word problems and checking every answer with an inverse operation.
How to use the course
- Read one lesson. It takes about five minutes.
- Study the worked example and the diagrams.
- Answer the five "Try it" questions and check your answers.
- Open the practice page for ten more questions.
- Move to the next lesson when you feel steady.
There are 10 lessons and 10 practice pages, all free and without an account.
Part of these grades
Looking for another topic?
Try the Fractions course