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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 417 · 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 × 10 =
  2. 2.15 × 10 =
  3. 3.24 × 25 =
  4. 4.75 × 24 =
  5. 5.26 × 25 =
  6. 6.38 × 125 =
  7. 7.45 × 28 =
  8. 8.14 × 45 =
  9. 9.12 × 45 =
  10. 10.18 × 75 =
  11. 11.55 × 36 =
  12. 12.65 × 12 =
  13. 13.15 × 40 =
  14. 14.45 × 10 =
  15. 15.16 × 55 =
  16. 16.65 × 28 =
  17. 17.20 × 25 =
  18. 18.30 × 35 =
  19. 19.75 × 10 =
  20. 20.10 × 125 =
  21. 21.25 × 16 =
  22. 22.65 × 12 =
  23. 23.15 × 34 =
  24. 24.75 × 22 =
  25. 25.36 × 125 =
  26. 26.20 × 125 =
  27. 27.14 × 25 =
  28. 28.26 × 15 =
  29. 29.26 × 75 =
  30. 30.32 × 75 =
  31. 31.75 × 12 =
  32. 32.25 × 12 =
  33. 33.125 × 16 =
  34. 34.6 × 15 =
  35. 35.34 × 125 =
  36. 36.20 × 15 =
  37. 37.18 × 45 =
  38. 38.8 × 125 =
  39. 39.26 × 55 =
  40. 40.32 × 35 =

Answer key

  1. 150
  2. 150
  3. 600
  4. 1800
  5. 650
  6. 4750
  7. 1260
  8. 630
  9. 540
  10. 1350
  11. 1980
  12. 780
  13. 600
  14. 450
  15. 880
  16. 1820
  17. 500
  18. 1050
  19. 750
  20. 1250
  21. 400
  22. 780
  23. 510
  24. 1650
  25. 4500
  26. 2500
  27. 350
  28. 390
  29. 1950
  30. 2400
  31. 900
  32. 300
  33. 2000
  34. 90
  35. 4250
  36. 300
  37. 810
  38. 1000
  39. 1430
  40. 1120

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