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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 582 · 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. 1.25 × 18 =
  2. 2.14 × 65 =
  3. 3.14 × 65 =
  4. 4.75 × 12 =
  5. 5.18 × 45 =
  6. 6.28 × 125 =
  7. 7.55 × 22 =
  8. 8.55 × 6 =
  9. 9.22 × 55 =
  10. 10.45 × 20 =
  11. 11.125 × 32 =
  12. 12.40 × 45 =
  13. 13.35 × 12 =
  14. 14.125 × 16 =
  15. 15.35 × 8 =
  16. 16.35 × 28 =
  17. 17.24 × 65 =
  18. 18.15 × 10 =
  19. 19.45 × 12 =
  20. 20.25 × 22 =
  21. 21.35 × 38 =
  22. 22.36 × 75 =
  23. 23.38 × 65 =
  24. 24.26 × 15 =
  25. 25.45 × 30 =
  26. 26.34 × 35 =
  27. 27.65 × 30 =
  28. 28.8 × 65 =
  29. 29.55 × 28 =
  30. 30.26 × 25 =
  31. 31.8 × 15 =
  32. 32.6 × 25 =
  33. 33.45 × 28 =
  34. 34.8 × 25 =
  35. 35.75 × 8 =
  36. 36.25 × 20 =
  37. 37.65 × 8 =
  38. 38.10 × 55 =
  39. 39.125 × 26 =
  40. 40.15 × 26 =

Answer key

  1. 450
  2. 910
  3. 910
  4. 900
  5. 810
  6. 3500
  7. 1210
  8. 330
  9. 1210
  10. 900
  11. 4000
  12. 1800
  13. 420
  14. 2000
  15. 280
  16. 980
  17. 1560
  18. 150
  19. 540
  20. 550
  21. 1330
  22. 2700
  23. 2470
  24. 390
  25. 1350
  26. 1190
  27. 1950
  28. 520
  29. 1540
  30. 650
  31. 120
  32. 150
  33. 1260
  34. 200
  35. 600
  36. 500
  37. 520
  38. 550
  39. 3250
  40. 390

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