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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 155 · 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. 1.35 × 38 =
  2. 2.55 × 34 =
  3. 3.55 × 30 =
  4. 4.45 × 8 =
  5. 5.6 × 55 =
  6. 6.25 × 18 =
  7. 7.8 × 25 =
  8. 8.125 × 12 =
  9. 9.10 × 15 =
  10. 10.30 × 35 =
  11. 11.12 × 45 =
  12. 12.38 × 35 =
  13. 13.35 × 14 =
  14. 14.36 × 45 =
  15. 15.75 × 30 =
  16. 16.65 × 12 =
  17. 17.28 × 25 =
  18. 18.24 × 55 =
  19. 19.15 × 8 =
  20. 20.20 × 35 =
  21. 21.55 × 8 =
  22. 22.25 × 22 =
  23. 23.6 × 35 =
  24. 24.35 × 36 =
  25. 25.34 × 55 =
  26. 26.15 × 26 =
  27. 27.125 × 12 =
  28. 28.25 × 14 =
  29. 29.35 × 26 =
  30. 30.15 × 16 =
  31. 31.15 × 10 =
  32. 32.22 × 15 =
  33. 33.15 × 34 =
  34. 34.55 × 38 =
  35. 35.15 × 18 =
  36. 36.16 × 45 =
  37. 37.26 × 75 =
  38. 38.18 × 25 =
  39. 39.55 × 28 =
  40. 40.6 × 65 =

Answer key

  1. 1330
  2. 1870
  3. 1650
  4. 360
  5. 330
  6. 450
  7. 200
  8. 1500
  9. 150
  10. 1050
  11. 540
  12. 1330
  13. 490
  14. 1620
  15. 2250
  16. 780
  17. 700
  18. 1320
  19. 120
  20. 700
  21. 440
  22. 550
  23. 210
  24. 1260
  25. 1870
  26. 390
  27. 1500
  28. 350
  29. 910
  30. 240
  31. 150
  32. 330
  33. 510
  34. 2090
  35. 270
  36. 720
  37. 1950
  38. 450
  39. 1540
  40. 390

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