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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 764 · 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. 1.15 × 24 =
  2. 2.35 × 24 =
  3. 3.16 × 55 =
  4. 4.65 × 40 =
  5. 5.15 × 12 =
  6. 6.40 × 25 =
  7. 7.25 × 28 =
  8. 8.35 × 26 =
  9. 9.8 × 65 =
  10. 10.125 × 8 =
  11. 11.75 × 26 =
  12. 12.125 × 24 =
  13. 13.20 × 15 =
  14. 14.65 × 38 =
  15. 15.14 × 75 =
  16. 16.55 × 16 =
  17. 17.14 × 75 =
  18. 18.14 × 45 =
  19. 19.36 × 45 =
  20. 20.22 × 125 =
  21. 21.65 × 34 =
  22. 22.125 × 10 =
  23. 23.40 × 25 =
  24. 24.38 × 15 =
  25. 25.75 × 20 =
  26. 26.6 × 65 =
  27. 27.45 × 16 =
  28. 28.25 × 34 =
  29. 29.45 × 14 =
  30. 30.25 × 34 =
  31. 31.32 × 15 =
  32. 32.35 × 20 =
  33. 33.22 × 25 =
  34. 34.20 × 55 =
  35. 35.34 × 75 =
  36. 36.24 × 15 =
  37. 37.45 × 10 =
  38. 38.10 × 65 =
  39. 39.40 × 45 =
  40. 40.125 × 6 =

Answer key

  1. 360
  2. 840
  3. 880
  4. 2600
  5. 180
  6. 1000
  7. 700
  8. 910
  9. 520
  10. 1000
  11. 1950
  12. 3000
  13. 300
  14. 2470
  15. 1050
  16. 880
  17. 1050
  18. 630
  19. 1620
  20. 2750
  21. 2210
  22. 1250
  23. 1000
  24. 570
  25. 1500
  26. 390
  27. 720
  28. 850
  29. 630
  30. 850
  31. 480
  32. 700
  33. 550
  34. 1100
  35. 2550
  36. 360
  37. 450
  38. 650
  39. 1800
  40. 750

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