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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 784 · 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. 1.30 × 65 =
  2. 2.15 × 12 =
  3. 3.35 × 6 =
  4. 4.125 × 26 =
  5. 5.35 × 12 =
  6. 6.55 × 30 =
  7. 7.75 × 26 =
  8. 8.65 × 34 =
  9. 9.10 × 35 =
  10. 10.75 × 16 =
  11. 11.125 × 16 =
  12. 12.6 × 15 =
  13. 13.20 × 65 =
  14. 14.12 × 75 =
  15. 15.12 × 45 =
  16. 16.25 × 34 =
  17. 17.45 × 16 =
  18. 18.26 × 55 =
  19. 19.18 × 15 =
  20. 20.55 × 20 =
  21. 21.8 × 25 =
  22. 22.12 × 65 =
  23. 23.65 × 24 =
  24. 24.32 × 75 =
  25. 25.125 × 16 =
  26. 26.65 × 40 =
  27. 27.16 × 125 =
  28. 28.40 × 45 =
  29. 29.65 × 36 =
  30. 30.28 × 125 =
  31. 31.38 × 65 =
  32. 32.26 × 125 =
  33. 33.25 × 10 =
  34. 34.14 × 15 =
  35. 35.35 × 40 =
  36. 36.55 × 14 =
  37. 37.35 × 36 =
  38. 38.24 × 55 =
  39. 39.25 × 34 =
  40. 40.24 × 65 =

Answer key

  1. 1950
  2. 180
  3. 210
  4. 3250
  5. 420
  6. 1650
  7. 1950
  8. 2210
  9. 350
  10. 1200
  11. 2000
  12. 90
  13. 1300
  14. 900
  15. 540
  16. 850
  17. 720
  18. 1430
  19. 270
  20. 1100
  21. 200
  22. 780
  23. 1560
  24. 2400
  25. 2000
  26. 2600
  27. 2000
  28. 1800
  29. 2340
  30. 3500
  31. 2470
  32. 3250
  33. 250
  34. 210
  35. 1400
  36. 770
  37. 1260
  38. 1320
  39. 850
  40. 1560

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