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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 654 · 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. 1.45 × 14 =
  2. 2.26 × 65 =
  3. 3.40 × 55 =
  4. 4.14 × 15 =
  5. 5.24 × 125 =
  6. 6.10 × 15 =
  7. 7.8 × 25 =
  8. 8.55 × 30 =
  9. 9.16 × 15 =
  10. 10.25 × 22 =
  11. 11.55 × 10 =
  12. 12.25 × 8 =
  13. 13.32 × 15 =
  14. 14.35 × 20 =
  15. 15.14 × 25 =
  16. 16.40 × 15 =
  17. 17.45 × 6 =
  18. 18.32 × 55 =
  19. 19.35 × 26 =
  20. 20.75 × 26 =
  21. 21.38 × 15 =
  22. 22.32 × 75 =
  23. 23.55 × 26 =
  24. 24.65 × 6 =
  25. 25.18 × 65 =
  26. 26.15 × 14 =
  27. 27.65 × 32 =
  28. 28.22 × 45 =
  29. 29.40 × 15 =
  30. 30.35 × 38 =
  31. 31.40 × 55 =
  32. 32.28 × 15 =
  33. 33.55 × 14 =
  34. 34.45 × 26 =
  35. 35.75 × 32 =
  36. 36.15 × 26 =
  37. 37.40 × 125 =
  38. 38.6 × 15 =
  39. 39.45 × 40 =
  40. 40.32 × 125 =

Answer key

  1. 630
  2. 1690
  3. 2200
  4. 210
  5. 3000
  6. 150
  7. 200
  8. 1650
  9. 240
  10. 550
  11. 550
  12. 200
  13. 480
  14. 700
  15. 350
  16. 600
  17. 270
  18. 1760
  19. 910
  20. 1950
  21. 570
  22. 2400
  23. 1430
  24. 390
  25. 1170
  26. 210
  27. 2080
  28. 990
  29. 600
  30. 1330
  31. 2200
  32. 420
  33. 770
  34. 1170
  35. 2400
  36. 390
  37. 5000
  38. 90
  39. 1800
  40. 4000

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