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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 455 · 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. 1.18 × 45 =
  2. 2.6 × 15 =
  3. 3.20 × 65 =
  4. 4.75 × 40 =
  5. 5.40 × 75 =
  6. 6.55 × 38 =
  7. 7.55 × 18 =
  8. 8.40 × 15 =
  9. 9.25 × 36 =
  10. 10.28 × 25 =
  11. 11.65 × 40 =
  12. 12.45 × 30 =
  13. 13.22 × 65 =
  14. 14.15 × 16 =
  15. 15.35 × 40 =
  16. 16.45 × 6 =
  17. 17.28 × 55 =
  18. 18.55 × 18 =
  19. 19.12 × 25 =
  20. 20.34 × 15 =
  21. 21.25 × 10 =
  22. 22.25 × 6 =
  23. 23.125 × 10 =
  24. 24.55 × 12 =
  25. 25.65 × 32 =
  26. 26.38 × 15 =
  27. 27.15 × 20 =
  28. 28.75 × 32 =
  29. 29.36 × 15 =
  30. 30.14 × 35 =
  31. 31.6 × 25 =
  32. 32.10 × 25 =
  33. 33.35 × 36 =
  34. 34.25 × 6 =
  35. 35.30 × 65 =
  36. 36.15 × 6 =
  37. 37.16 × 25 =
  38. 38.20 × 15 =
  39. 39.35 × 30 =
  40. 40.75 × 20 =

Answer key

  1. 810
  2. 90
  3. 1300
  4. 3000
  5. 3000
  6. 2090
  7. 990
  8. 600
  9. 900
  10. 700
  11. 2600
  12. 1350
  13. 1430
  14. 240
  15. 1400
  16. 270
  17. 1540
  18. 990
  19. 300
  20. 510
  21. 250
  22. 150
  23. 1250
  24. 660
  25. 2080
  26. 570
  27. 300
  28. 2400
  29. 540
  30. 490
  31. 150
  32. 250
  33. 1260
  34. 150
  35. 1950
  36. 90
  37. 400
  38. 300
  39. 1050
  40. 1500

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