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Mathematics · Grade 4

Multiply Multi-Digit Numbers

Learners use multiplication to compare amounts ('5 times as many'), multiply numbers up to four digits by a one-digit number, and multiply two two-digit numbers. Area models and partial products built on place value show why each method works, and estimates help learners judge whether a product is reasonable.

  • 4 lessons
  • About 85 minutes
  • Multiplication check: 8 questions
  • Ways to answer: fill in the blanks, choose an answer, match pairs, type a number, sort into groups and true or false
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What learners will discover

  • Interpret and solve multiplicative comparisons such as '24 is 4 times as many as 6', and tell them apart from additive comparisons.
  • Multiply a whole number of up to four digits by a one-digit number using place value and partial products.
  • Multiply two two-digit numbers using an area model and partial products.
  • Estimate products by rounding and use the estimate to judge whether a product is reasonable.

Lessons

  1. Times as many 6 steps4 practiceabout 20 min
  2. Multiply by a one-digit number 7 steps4 practiceabout 22 min
  3. Two-digit by two-digit 6 steps4 practiceabout 22 min
  4. Estimate to check 6 steps3 practiceabout 21 min
  5. Multiplication check 8 questions at the end

Keep exploring

Games to practice with

  • Number-Line HopHelp the frog hop to the right number — from counting to negative fractions.
  • Paint by AnswersSolve each space, dip your brush and watch a picture come to life.
  • Array OrchardPlant trees in rows, pack fruit into crates and split big fields to multiply.

More 4th grade math

Guide for grown-ups