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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 51 · 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 × 22 =
  2. 2.12 × 45 =
  3. 3.6 × 35 =
  4. 4.55 × 40 =
  5. 5.15 × 24 =
  6. 6.26 × 15 =
  7. 7.40 × 65 =
  8. 8.40 × 45 =
  9. 9.15 × 8 =
  10. 10.75 × 26 =
  11. 11.15 × 14 =
  12. 12.75 × 8 =
  13. 13.10 × 45 =
  14. 14.25 × 28 =
  15. 15.65 × 40 =
  16. 16.22 × 55 =
  17. 17.22 × 75 =
  18. 18.8 × 65 =
  19. 19.28 × 15 =
  20. 20.75 × 30 =
  21. 21.12 × 65 =
  22. 22.65 × 28 =
  23. 23.35 × 40 =
  24. 24.45 × 10 =
  25. 25.65 × 18 =
  26. 26.35 × 18 =
  27. 27.15 × 40 =
  28. 28.8 × 15 =
  29. 29.65 × 32 =
  30. 30.125 × 14 =
  31. 31.14 × 45 =
  32. 32.24 × 25 =
  33. 33.15 × 12 =
  34. 34.125 × 34 =
  35. 35.125 × 14 =
  36. 36.15 × 12 =
  37. 37.35 × 40 =
  38. 38.45 × 26 =
  39. 39.55 × 28 =
  40. 40.20 × 55 =

Answer key

  1. 330
  2. 540
  3. 210
  4. 2200
  5. 360
  6. 390
  7. 2600
  8. 1800
  9. 120
  10. 1950
  11. 210
  12. 600
  13. 450
  14. 700
  15. 2600
  16. 1210
  17. 1650
  18. 520
  19. 420
  20. 2250
  21. 780
  22. 1820
  23. 1400
  24. 450
  25. 1170
  26. 630
  27. 600
  28. 120
  29. 2080
  30. 1750
  31. 630
  32. 600
  33. 180
  34. 4250
  35. 1750
  36. 180
  37. 1400
  38. 1170
  39. 1540
  40. 1100

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