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Multiply and divide negatives: 7th grade math

Multiply/divide integers and rationals; sign rules. A free 7th 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: multiply/divide integers and rationals; sign rules.

Teach (10 min)

  • Same signs: the product is positive. Different signs: the product is negative.
  • (−6) × (−4) = 24, but (−6) × 4 = −24. Multiply the sizes first, then pick the sign.
  • 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/rational.mul?lesson=7-rat-mul-int&at=7

Exit ticket (5 min)

  • Three questions on a slip:
  • 1. 4 × (−2) = ?
  • 2. 7 × (−9) = ?
  • 3. (−7) × (−3) = ?

Question set

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

  1. 4 × (−2) = ?
  2. 7 × (−9) = ?
  3. (−7) × (−3) = ?
  4. 4 × (−9) = ?
  5. 4 × (−4) = ?
  6. (−8) × (−2) = ?
  7. (−6) × 8 = ?
  8. (−7) × (−7) = ?
  9. 6 × (−7) = ?
  10. 5 × (−3) = ?
Answers
  1. −8
  2. −63
  3. 21
  4. −36
  5. −16
  6. 16
  7. −48
  8. 49
  9. −42
  10. −15

Printable sheet

Name: ____________________   Date: ____________

Multiply and divide negatives (7th grade)

  1. (−3) × 5 = ?
  2. (−5) × 2 = ?
  3. (−4) × (−8) = ?
  4. (−8) × (−6) = ?
  5. 6 × (−9) = ?
  6. (−9) × 9 = ?
  7. (−7) × (−11) = ?
  8. (−4) × (−4) = ?
  9. (−10) × (−12) = ?
  10. 12 × (−2) = ?
  11. 6 × (−11) = ?
  12. (−3) × (−4) = ?
Key
  1. −15
  2. −10
  3. 32
  4. 48
  5. −54
  6. −81
  7. 77
  8. 16
  9. 120
  10. −24
  11. −66
  12. 12

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.