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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 461 · 40 questions
TalentJR

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

NameDateTime takenScore ___ / 40
  1. 1.32 × 75 =
  2. 2.32 × 15 =
  3. 3.34 × 125 =
  4. 4.75 × 26 =
  5. 5.55 × 38 =
  6. 6.35 × 12 =
  7. 7.25 × 6 =
  8. 8.75 × 14 =
  9. 9.75 × 10 =
  10. 10.35 × 30 =
  11. 11.25 × 6 =
  12. 12.18 × 75 =
  13. 13.55 × 30 =
  14. 14.12 × 75 =
  15. 15.45 × 10 =
  16. 16.25 × 38 =
  17. 17.45 × 14 =
  18. 18.35 × 18 =
  19. 19.125 × 8 =
  20. 20.10 × 125 =
  21. 21.25 × 6 =
  22. 22.55 × 6 =
  23. 23.22 × 125 =
  24. 24.75 × 28 =
  25. 25.45 × 12 =
  26. 26.35 × 30 =
  27. 27.65 × 8 =
  28. 28.45 × 20 =
  29. 29.8 × 15 =
  30. 30.65 × 34 =
  31. 31.25 × 26 =
  32. 32.15 × 32 =
  33. 33.6 × 45 =
  34. 34.55 × 40 =
  35. 35.26 × 75 =
  36. 36.125 × 8 =
  37. 37.25 × 22 =
  38. 38.25 × 8 =
  39. 39.32 × 125 =
  40. 40.65 × 18 =

Answer key

  1. 2400
  2. 480
  3. 4250
  4. 1950
  5. 2090
  6. 420
  7. 150
  8. 1050
  9. 750
  10. 1050
  11. 150
  12. 1350
  13. 1650
  14. 900
  15. 450
  16. 950
  17. 630
  18. 630
  19. 1000
  20. 1250
  21. 150
  22. 330
  23. 2750
  24. 2100
  25. 540
  26. 1050
  27. 520
  28. 900
  29. 120
  30. 2210
  31. 650
  32. 480
  33. 270
  34. 2200
  35. 1950
  36. 1000
  37. 550
  38. 200
  39. 4000
  40. 1170

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