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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 409 · 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 × 26 =
  2. 2.22 × 35 =
  3. 3.20 × 75 =
  4. 4.15 × 16 =
  5. 5.25 × 26 =
  6. 6.65 × 20 =
  7. 7.15 × 28 =
  8. 8.25 × 6 =
  9. 9.125 × 10 =
  10. 10.35 × 12 =
  11. 11.35 × 34 =
  12. 12.75 × 16 =
  13. 13.26 × 55 =
  14. 14.45 × 20 =
  15. 15.20 × 65 =
  16. 16.35 × 26 =
  17. 17.65 × 34 =
  18. 18.32 × 55 =
  19. 19.16 × 125 =
  20. 20.15 × 38 =
  21. 21.12 × 25 =
  22. 22.16 × 35 =
  23. 23.10 × 45 =
  24. 24.75 × 30 =
  25. 25.24 × 15 =
  26. 26.40 × 65 =
  27. 27.35 × 18 =
  28. 28.35 × 16 =
  29. 29.12 × 35 =
  30. 30.65 × 12 =
  31. 31.45 × 10 =
  32. 32.45 × 14 =
  33. 33.65 × 8 =
  34. 34.20 × 75 =
  35. 35.25 × 24 =
  36. 36.45 × 10 =
  37. 37.65 × 28 =
  38. 38.125 × 18 =
  39. 39.55 × 30 =
  40. 40.45 × 24 =

Answer key

  1. 390
  2. 770
  3. 1500
  4. 240
  5. 650
  6. 1300
  7. 420
  8. 150
  9. 1250
  10. 420
  11. 1190
  12. 1200
  13. 1430
  14. 900
  15. 1300
  16. 910
  17. 2210
  18. 1760
  19. 2000
  20. 570
  21. 300
  22. 560
  23. 450
  24. 2250
  25. 360
  26. 2600
  27. 630
  28. 560
  29. 420
  30. 780
  31. 450
  32. 630
  33. 520
  34. 1500
  35. 600
  36. 450
  37. 1820
  38. 2250
  39. 1650
  40. 1080

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