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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 242 · 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. 1.18 × 125 =
  2. 2.25 × 24 =
  3. 3.34 × 15 =
  4. 4.65 × 12 =
  5. 5.15 × 40 =
  6. 6.65 × 28 =
  7. 7.22 × 65 =
  8. 8.15 × 22 =
  9. 9.75 × 18 =
  10. 10.25 × 26 =
  11. 11.75 × 12 =
  12. 12.38 × 65 =
  13. 13.125 × 16 =
  14. 14.24 × 25 =
  15. 15.30 × 55 =
  16. 16.75 × 36 =
  17. 17.25 × 10 =
  18. 18.35 × 16 =
  19. 19.18 × 75 =
  20. 20.65 × 16 =
  21. 21.125 × 8 =
  22. 22.45 × 10 =
  23. 23.35 × 16 =
  24. 24.38 × 15 =
  25. 25.16 × 75 =
  26. 26.25 × 14 =
  27. 27.16 × 25 =
  28. 28.45 × 24 =
  29. 29.45 × 10 =
  30. 30.22 × 125 =
  31. 31.12 × 45 =
  32. 32.14 × 65 =
  33. 33.35 × 12 =
  34. 34.65 × 16 =
  35. 35.65 × 12 =
  36. 36.38 × 35 =
  37. 37.40 × 65 =
  38. 38.45 × 32 =
  39. 39.36 × 45 =
  40. 40.6 × 125 =

Answer key

  1. 2250
  2. 600
  3. 510
  4. 780
  5. 600
  6. 1820
  7. 1430
  8. 330
  9. 1350
  10. 650
  11. 900
  12. 2470
  13. 2000
  14. 600
  15. 1650
  16. 2700
  17. 250
  18. 560
  19. 1350
  20. 1040
  21. 1000
  22. 450
  23. 560
  24. 570
  25. 1200
  26. 350
  27. 400
  28. 1080
  29. 450
  30. 2750
  31. 540
  32. 910
  33. 420
  34. 1040
  35. 780
  36. 1330
  37. 2600
  38. 1440
  39. 1620
  40. 750

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