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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 46 · 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. 1.25 × 14 =
  2. 2.26 × 15 =
  3. 3.75 × 12 =
  4. 4.30 × 35 =
  5. 5.75 × 22 =
  6. 6.15 × 26 =
  7. 7.45 × 40 =
  8. 8.26 × 55 =
  9. 9.36 × 25 =
  10. 10.25 × 14 =
  11. 11.55 × 24 =
  12. 12.40 × 125 =
  13. 13.35 × 36 =
  14. 14.18 × 35 =
  15. 15.75 × 14 =
  16. 16.45 × 34 =
  17. 17.16 × 65 =
  18. 18.38 × 75 =
  19. 19.16 × 15 =
  20. 20.75 × 38 =
  21. 21.125 × 20 =
  22. 22.36 × 75 =
  23. 23.40 × 75 =
  24. 24.75 × 26 =
  25. 25.15 × 40 =
  26. 26.8 × 15 =
  27. 27.15 × 16 =
  28. 28.75 × 40 =
  29. 29.65 × 34 =
  30. 30.18 × 65 =
  31. 31.32 × 35 =
  32. 32.15 × 30 =
  33. 33.16 × 75 =
  34. 34.55 × 14 =
  35. 35.25 × 32 =
  36. 36.6 × 15 =
  37. 37.20 × 65 =
  38. 38.75 × 32 =
  39. 39.40 × 125 =
  40. 40.125 × 30 =

Answer key

  1. 350
  2. 390
  3. 900
  4. 1050
  5. 1650
  6. 390
  7. 1800
  8. 1430
  9. 900
  10. 350
  11. 1320
  12. 5000
  13. 1260
  14. 630
  15. 1050
  16. 1530
  17. 1040
  18. 2850
  19. 240
  20. 2850
  21. 2500
  22. 2700
  23. 3000
  24. 1950
  25. 600
  26. 120
  27. 240
  28. 3000
  29. 2210
  30. 1170
  31. 1120
  32. 450
  33. 1200
  34. 770
  35. 800
  36. 90
  37. 1300
  38. 2400
  39. 5000
  40. 3750

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