➕ 3rd Grade Math · Unit 1

Introducing Multiplication

16 short narrated lessons in 3 chapters, each with pictures, a quiz with a hint and a second try, and an explanation for every answer.

Standards: 3.OA.A.1 3.OA.A.3 3.OA.C.7 3.OA.D.9

3rd Grade Math · 7 units
  1. 1Introducing Multiplication
  2. 2Area and Multiplication
  3. 3Adding and Subtracting within 1,000
  4. 4Multiplication and Division
  5. 5Fractions
  6. 6Measurement and Data
  7. 7Shapes and Perimeter
Picture from the lesson “What Are Equal Groups?”
What Are Equal Groups?
Picture from the lesson “Counting Equal Groups Fast”
Counting Equal Groups Fast
Picture from the lesson “Writing Multiplication Sentences”
Writing Multiplication Sentences

What your child will learn

Equal groups

  1. What Are Equal Groups?Recognize equal groups: groups that each have the same number of things.
  2. Counting Equal Groups FastFind the total in equal groups by skip counting or adding the same number again and again.
  3. Writing Multiplication SentencesWrite a multiplication sentence like 3 times 4 equals 12 for equal groups, and tell what each number means.
  4. Multiplication StoriesTell and solve story problems about equal groups using multiplication.
  5. Equal Groups Review ReviewReview equal groups, skip counting and writing multiplication sentences.

Arrays

  1. Rows and ColumnsDescribe an array as objects arranged in equal rows and equal columns.
  2. Arrays Show MultiplicationUse an array to find a product: number of rows times number in each row.
  3. Turning Arrays AroundSee that turning an array does not change the total, so 3 times 5 equals 5 times 3.
  4. Solving Problems with ArraysDraw arrays to solve word problems about rows of objects.
  5. Arrays Review ReviewReview arrays and how they show multiplication.

Multiplying by 2, 5 and 10

  1. Doubling: Multiplying by 2Multiply by 2 by doubling and skip counting by twos.
  2. Multiplying by 5Multiply by 5 using skip counting and patterns in the ones digit.
  3. Multiplying by 10Multiply by 10 and notice the zero in the ones place.
  4. Patterns on the Multiplication TableFind and explain patterns in the multiplication table, like even products.
  5. Twos, Fives and Tens Review ReviewReview multiplying by 2, 5 and 10 and the patterns they make.
  6. Unit 1 Test: Multiplication FunShow what you learned in the whole unit (Equal groups, Arrays, Multiplying by 2, 5 and 10) by answering mixed questions.

Try a question from this unit

From the lesson “What Are Equal Groups?”

Which set of groups shows equal groups?

  • 2, 4, 3
  • 3, 3, 3
  • 5, 1, 5
  • 4, 3, 4
Show the answer

3, 3, 3. In 3, 3, 3 every group has 3 things, so the groups are equal.

Hint kids see after a wrong try: “Look for the set where every number is the same.”

Key words

  • equal groups
  • total
  • skip count
  • multiply
  • factor
  • product
  • times
  • array
  • row
  • column
  • commutative property
  • equation
  • double
  • pattern
  • ones place
  • even
  • odd
All 3rd Grade Math units Area and Multiplication →

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