➕ 4th Grade Math · Unit 3

Multiplying Multi-Digit Numbers

10 short narrated lessons in 2 chapters, each with pictures, a quiz with a hint and a second try, and an explanation for every answer.

Standards: 4.NBT.B.5

4th Grade Math · 9 units
  1. 1Place Value and Big Numbers
  2. 2Multiplicative Comparison and Factors
  3. 3Multiplying Multi-Digit Numbers
  4. 4Dividing Multi-Digit Numbers
  5. 5Fraction Equivalence and Comparison
  6. 6Adding, Subtracting and Multiplying Fractions
  7. 7Decimals
  8. 8Measurement
  9. 9Angles and Shapes
Picture from the lesson “Multiplying by 10, 100 and 1,000”
Multiplying by 10, 100 and 1,000
Picture from the lesson “Multiplying with an Area Model”
Multiplying with an Area Model
Picture from the lesson “Multiplying with Partial Products”
Multiplying with Partial Products

What your child will learn

Multiplying by a one-digit number

  1. Multiplying by 10, 100 and 1,000Multiply a one-digit number by ten, one hundred and one thousand, and by multiples of them, using place value.
  2. Multiplying with an Area ModelMultiply a two-digit number by a one-digit number by splitting it into tens and ones in an area model.
  3. Multiplying with Partial ProductsMultiply a three-digit or four-digit number by a one-digit number by adding partial products.
  4. The Standard Algorithm for MultiplyingMultiply a multi-digit number by a one-digit number with the standard algorithm, regrouping as needed.
  5. Multiplying Review ReviewReview ways to multiply a multi-digit number by a one-digit number.

Multiplying two-digit numbers

  1. Multiplying Tens by TensMultiply two multiples of ten, like thirty times forty, using basic facts and place value.
  2. Area Models with Two Two-Digit NumbersMultiply two two-digit numbers by splitting both into tens and ones in an area model with four parts.
  3. Four Partial ProductsMultiply two two-digit numbers by writing and adding the four partial products.
  4. Two-Digit Multiplying Review ReviewReview multiplying a two-digit number by a two-digit number.
  5. Big Multiplication Unit TestShow what you learned in the whole unit (Multiplying by a one-digit number, Multiplying two-digit numbers) by answering mixed questions.

Try a question from this unit

From the lesson “Multiplying by 10, 100 and 1,000”

A bar showing 6 times 100.

What is 6 × 100?

  • 60
  • 600
  • 6,000
  • 106
Show the answer

600. 6 times 100 is 6 hundreds, which is 600.

Hint kids see after a wrong try: “Multiplying by 100 moves each digit two places to the left.”

Key words

  • multiple of ten
  • place value
  • area model
  • partial products
  • distributive property
  • standard algorithm
  • regroup
← Multiplicative Comparison and Factors All 4th Grade Math units Dividing Multi-Digit Numbers →

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Narrated lessons, pictures and quizzes for every grade from K to 8. Works offline.

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