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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 700 · 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. 1.26 × 35 =
  2. 2.10 × 15 =
  3. 3.45 × 38 =
  4. 4.32 × 45 =
  5. 5.25 × 20 =
  6. 6.55 × 38 =
  7. 7.55 × 12 =
  8. 8.30 × 15 =
  9. 9.14 × 45 =
  10. 10.65 × 24 =
  11. 11.35 × 32 =
  12. 12.75 × 14 =
  13. 13.65 × 16 =
  14. 14.14 × 35 =
  15. 15.22 × 15 =
  16. 16.6 × 75 =
  17. 17.125 × 26 =
  18. 18.12 × 125 =
  19. 19.25 × 40 =
  20. 20.35 × 20 =
  21. 21.25 × 20 =
  22. 22.45 × 28 =
  23. 23.125 × 14 =
  24. 24.25 × 16 =
  25. 25.55 × 18 =
  26. 26.65 × 14 =
  27. 27.6 × 45 =
  28. 28.55 × 18 =
  29. 29.14 × 125 =
  30. 30.14 × 55 =
  31. 31.28 × 35 =
  32. 32.75 × 20 =
  33. 33.24 × 45 =
  34. 34.36 × 55 =
  35. 35.15 × 40 =
  36. 36.24 × 45 =
  37. 37.36 × 15 =
  38. 38.10 × 65 =
  39. 39.8 × 65 =
  40. 40.6 × 15 =

Answer key

  1. 910
  2. 150
  3. 1710
  4. 1440
  5. 500
  6. 2090
  7. 660
  8. 450
  9. 630
  10. 1560
  11. 1120
  12. 1050
  13. 1040
  14. 490
  15. 330
  16. 450
  17. 3250
  18. 1500
  19. 1000
  20. 700
  21. 500
  22. 1260
  23. 1750
  24. 400
  25. 990
  26. 910
  27. 270
  28. 990
  29. 1750
  30. 770
  31. 980
  32. 1500
  33. 1080
  34. 1980
  35. 600
  36. 1080
  37. 540
  38. 650
  39. 520
  40. 90

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