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Times table rules: 3rd grade math

Properties: commutative, associative, distributive. A free 3rd grade lesson plan, a question set with answers and a printable sheet with its key. Copy it and make it yours.

Lesson plan

Goal

  • Students can do this: properties: commutative, associative, distributive.

Teach (10 min)

  • Order does not matter: 6 × 7 = 7 × 6.
  • 6 × 7 = 6 × 5 + 6 × 2 = 30 + 12.
  • Work one example on the board while students say each step aloud, then do one together.

Practise (15 min)

  • Students work the printable sheet in pairs, then alone.
  • Or practise it as a game with no sign-up: https://peabody.kids/math/numsense.g3_props?lesson=3-numsense-props-1&at=3

Exit ticket (5 min)

  • Three questions on a slip:
  • 1. Find the missing number: 5 × 8 = 8 × ?
  • 2. Find the missing number: 7 × 8 = 7 × 3 + 7 × ?
  • 3. Find the missing number: 8 × 8 = 8 × 6 + 8 × ?

Question set

10 questions that read in words, easiest first. Questions that need a picture are on the printable sheet below.

  1. Find the missing number: 5 × 8 = 8 × ?
  2. Find the missing number: 7 × 8 = 7 × 3 + 7 × ?
  3. Find the missing number: 8 × 8 = 8 × 6 + 8 × ?
  4. Find the missing number: 3 × 5 = 5 × ?
  5. Find the missing number: 8 × 6 = 8 × 4 + 8 × ?
  6. Find the missing number: 5 × 7 = 5 × 2 + 5 × ?
  7. Find the missing number: 6 × 5 = 6 × 4 + 6 × ?
  8. Find the missing number: 4 × 6 = 6 × ?
  9. Find the missing number: (2 × 4) × 2 = 2 × (4 × ?)
  10. Find the missing number: (2 × 3) × 3 = 2 × (3 × ?)
Answers
  1. 5
  2. 5
  3. 2
  4. 3
  5. 2
  6. 5
  7. 1
  8. 4
  9. 2
  10. 3

Printable sheet

Name: ____________________   Date: ____________

Times table rules (3rd grade)

  1. Find the missing number: 3 × 8 = 3 × 5 + 3 × ?
  2. Find the missing number: 9 × 9 = 9 × ?
  3. Find the missing number: 3 × 5 = 3 × 3 + 3 × ?
  4. Find the missing number: 5 × 7 = 7 × ?
  5. Find the missing number: 8 × 7 = 8 × 3 + 8 × ?
  6. Find the missing number: 6 × 9 = 9 × ?
  7. Find the missing number: 4 × 4 = 4 × 1 + 4 × ?
  8. Which one is equal to 7 × 8?
  9. Which one is equal to 4 × 7?
  10. Find the missing number: 4 × 7 = 4 × 3 + 4 × ?
  11. Find the missing number: 6 × 9 = 6 × 3 + 6 × ?
  12. Find the missing number: (4 × 4) × 3 = 4 × (4 × ?)
Key
  1. 3
  2. 9
  3. 2
  4. 5
  5. 4
  6. 6
  7. 3
  8. 7 × 5 + 7 × 3
  9. 4 × 2 + 4 × 5
  10. 4
  11. 6
  12. 3

Written by Peabody from its own skill pages. Free, no ads, no sign-in. Children can practise this on Peabody. More from teachers: teacher-shared resources.