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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 531 · 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. 1.65 × 12 =
  2. 2.35 × 24 =
  3. 3.36 × 55 =
  4. 4.40 × 15 =
  5. 5.35 × 30 =
  6. 6.35 × 8 =
  7. 7.65 × 40 =
  8. 8.65 × 40 =
  9. 9.30 × 15 =
  10. 10.15 × 8 =
  11. 11.55 × 36 =
  12. 12.25 × 32 =
  13. 13.45 × 14 =
  14. 14.28 × 125 =
  15. 15.40 × 25 =
  16. 16.18 × 55 =
  17. 17.65 × 14 =
  18. 18.25 × 32 =
  19. 19.45 × 6 =
  20. 20.15 × 8 =
  21. 21.10 × 45 =
  22. 22.55 × 12 =
  23. 23.65 × 6 =
  24. 24.8 × 75 =
  25. 25.65 × 36 =
  26. 26.15 × 8 =
  27. 27.26 × 75 =
  28. 28.35 × 34 =
  29. 29.16 × 15 =
  30. 30.55 × 18 =
  31. 31.35 × 14 =
  32. 32.18 × 65 =
  33. 33.35 × 30 =
  34. 34.75 × 32 =
  35. 35.24 × 35 =
  36. 36.45 × 34 =
  37. 37.18 × 125 =
  38. 38.22 × 75 =
  39. 39.75 × 14 =
  40. 40.36 × 55 =

Answer key

  1. 780
  2. 840
  3. 1980
  4. 600
  5. 1050
  6. 280
  7. 2600
  8. 2600
  9. 450
  10. 120
  11. 1980
  12. 800
  13. 630
  14. 3500
  15. 1000
  16. 990
  17. 910
  18. 800
  19. 270
  20. 120
  21. 450
  22. 660
  23. 390
  24. 600
  25. 2340
  26. 120
  27. 1950
  28. 1190
  29. 240
  30. 990
  31. 490
  32. 1170
  33. 1050
  34. 2400
  35. 840
  36. 1530
  37. 2250
  38. 1650
  39. 1050
  40. 1980

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