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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 709 · 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. 1.24 × 25 =
  2. 2.25 × 36 =
  3. 3.20 × 75 =
  4. 4.65 × 18 =
  5. 5.75 × 32 =
  6. 6.40 × 125 =
  7. 7.125 × 8 =
  8. 8.40 × 75 =
  9. 9.45 × 36 =
  10. 10.15 × 10 =
  11. 11.125 × 14 =
  12. 12.45 × 22 =
  13. 13.10 × 35 =
  14. 14.25 × 20 =
  15. 15.24 × 125 =
  16. 16.35 × 34 =
  17. 17.45 × 30 =
  18. 18.12 × 45 =
  19. 19.35 × 16 =
  20. 20.65 × 20 =
  21. 21.75 × 30 =
  22. 22.35 × 14 =
  23. 23.75 × 20 =
  24. 24.15 × 36 =
  25. 25.26 × 35 =
  26. 26.18 × 65 =
  27. 27.18 × 45 =
  28. 28.15 × 16 =
  29. 29.15 × 8 =
  30. 30.14 × 65 =
  31. 31.55 × 16 =
  32. 32.35 × 38 =
  33. 33.14 × 15 =
  34. 34.65 × 16 =
  35. 35.75 × 28 =
  36. 36.35 × 16 =
  37. 37.16 × 35 =
  38. 38.45 × 32 =
  39. 39.40 × 125 =
  40. 40.65 × 12 =

Answer key

  1. 600
  2. 900
  3. 1500
  4. 1170
  5. 2400
  6. 5000
  7. 1000
  8. 3000
  9. 1620
  10. 150
  11. 1750
  12. 990
  13. 350
  14. 500
  15. 3000
  16. 1190
  17. 1350
  18. 540
  19. 560
  20. 1300
  21. 2250
  22. 490
  23. 1500
  24. 540
  25. 910
  26. 1170
  27. 810
  28. 240
  29. 120
  30. 910
  31. 880
  32. 1330
  33. 210
  34. 1040
  35. 2100
  36. 560
  37. 560
  38. 1440
  39. 5000
  40. 780

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