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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 133 · 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 × 20 =
  2. 2.75 × 12 =
  3. 3.16 × 25 =
  4. 4.35 × 20 =
  5. 5.10 × 125 =
  6. 6.65 × 10 =
  7. 7.6 × 65 =
  8. 8.15 × 28 =
  9. 9.36 × 15 =
  10. 10.55 × 16 =
  11. 11.65 × 12 =
  12. 12.75 × 24 =
  13. 13.36 × 55 =
  14. 14.125 × 28 =
  15. 15.15 × 36 =
  16. 16.20 × 75 =
  17. 17.125 × 26 =
  18. 18.22 × 65 =
  19. 19.55 × 16 =
  20. 20.15 × 16 =
  21. 21.125 × 10 =
  22. 22.15 × 10 =
  23. 23.12 × 15 =
  24. 24.16 × 45 =
  25. 25.45 × 16 =
  26. 26.75 × 22 =
  27. 27.15 × 38 =
  28. 28.65 × 8 =
  29. 29.14 × 65 =
  30. 30.26 × 25 =
  31. 31.6 × 125 =
  32. 32.6 × 55 =
  33. 33.40 × 45 =
  34. 34.18 × 35 =
  35. 35.15 × 34 =
  36. 36.10 × 35 =
  37. 37.38 × 15 =
  38. 38.22 × 65 =
  39. 39.75 × 14 =
  40. 40.6 × 75 =

Answer key

  1. 900
  2. 900
  3. 400
  4. 700
  5. 1250
  6. 650
  7. 390
  8. 420
  9. 540
  10. 880
  11. 780
  12. 1800
  13. 1980
  14. 3500
  15. 540
  16. 1500
  17. 3250
  18. 1430
  19. 880
  20. 240
  21. 1250
  22. 150
  23. 180
  24. 720
  25. 720
  26. 1650
  27. 570
  28. 520
  29. 910
  30. 650
  31. 750
  32. 330
  33. 1800
  34. 630
  35. 510
  36. 350
  37. 570
  38. 1430
  39. 1050
  40. 450

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