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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 820 · 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. 1.32 × 65 =
  2. 2.34 × 35 =
  3. 3.16 × 35 =
  4. 4.35 × 14 =
  5. 5.36 × 125 =
  6. 6.35 × 18 =
  7. 7.65 × 6 =
  8. 8.18 × 35 =
  9. 9.8 × 125 =
  10. 10.6 × 55 =
  11. 11.125 × 12 =
  12. 12.24 × 25 =
  13. 13.14 × 75 =
  14. 14.25 × 14 =
  15. 15.26 × 125 =
  16. 16.45 × 40 =
  17. 17.36 × 35 =
  18. 18.30 × 75 =
  19. 19.55 × 12 =
  20. 20.55 × 36 =
  21. 21.28 × 45 =
  22. 22.75 × 30 =
  23. 23.25 × 24 =
  24. 24.18 × 15 =
  25. 25.30 × 35 =
  26. 26.18 × 55 =
  27. 27.8 × 15 =
  28. 28.125 × 38 =
  29. 29.65 × 28 =
  30. 30.36 × 125 =
  31. 31.55 × 20 =
  32. 32.15 × 22 =
  33. 33.34 × 55 =
  34. 34.6 × 65 =
  35. 35.15 × 24 =
  36. 36.22 × 125 =
  37. 37.55 × 6 =
  38. 38.38 × 45 =
  39. 39.55 × 10 =
  40. 40.55 × 40 =

Answer key

  1. 2080
  2. 1190
  3. 560
  4. 490
  5. 4500
  6. 630
  7. 390
  8. 630
  9. 1000
  10. 330
  11. 1500
  12. 600
  13. 1050
  14. 350
  15. 3250
  16. 1800
  17. 1260
  18. 2250
  19. 660
  20. 1980
  21. 1260
  22. 2250
  23. 600
  24. 270
  25. 1050
  26. 990
  27. 120
  28. 4750
  29. 1820
  30. 4500
  31. 1100
  32. 330
  33. 1870
  34. 390
  35. 360
  36. 2750
  37. 330
  38. 1710
  39. 550
  40. 2200

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