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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 273 · 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. 1.38 × 15 =
  2. 2.45 × 40 =
  3. 3.12 × 65 =
  4. 4.75 × 32 =
  5. 5.28 × 125 =
  6. 6.6 × 55 =
  7. 7.55 × 30 =
  8. 8.30 × 15 =
  9. 9.15 × 8 =
  10. 10.25 × 32 =
  11. 11.55 × 14 =
  12. 12.125 × 34 =
  13. 13.65 × 40 =
  14. 14.125 × 38 =
  15. 15.36 × 75 =
  16. 16.28 × 75 =
  17. 17.35 × 16 =
  18. 18.15 × 20 =
  19. 19.34 × 25 =
  20. 20.25 × 8 =
  21. 21.15 × 10 =
  22. 22.12 × 75 =
  23. 23.45 × 24 =
  24. 24.55 × 14 =
  25. 25.125 × 40 =
  26. 26.36 × 75 =
  27. 27.65 × 30 =
  28. 28.16 × 125 =
  29. 29.10 × 55 =
  30. 30.15 × 20 =
  31. 31.10 × 75 =
  32. 32.22 × 15 =
  33. 33.18 × 75 =
  34. 34.26 × 125 =
  35. 35.6 × 65 =
  36. 36.40 × 15 =
  37. 37.26 × 45 =
  38. 38.65 × 30 =
  39. 39.45 × 40 =
  40. 40.35 × 22 =

Answer key

  1. 570
  2. 1800
  3. 780
  4. 2400
  5. 3500
  6. 330
  7. 1650
  8. 450
  9. 120
  10. 800
  11. 770
  12. 4250
  13. 2600
  14. 4750
  15. 2700
  16. 2100
  17. 560
  18. 300
  19. 850
  20. 200
  21. 150
  22. 900
  23. 1080
  24. 770
  25. 5000
  26. 2700
  27. 1950
  28. 2000
  29. 550
  30. 300
  31. 750
  32. 330
  33. 1350
  34. 3250
  35. 390
  36. 600
  37. 1170
  38. 1950
  39. 1800
  40. 770

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