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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 653 · 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. 1.55 × 40 =
  2. 2.55 × 26 =
  3. 3.34 × 45 =
  4. 4.45 × 40 =
  5. 5.75 × 26 =
  6. 6.55 × 12 =
  7. 7.125 × 22 =
  8. 8.15 × 10 =
  9. 9.75 × 34 =
  10. 10.16 × 15 =
  11. 11.34 × 125 =
  12. 12.35 × 14 =
  13. 13.45 × 16 =
  14. 14.55 × 24 =
  15. 15.35 × 12 =
  16. 16.36 × 45 =
  17. 17.35 × 28 =
  18. 18.55 × 14 =
  19. 19.125 × 36 =
  20. 20.65 × 12 =
  21. 21.40 × 125 =
  22. 22.32 × 125 =
  23. 23.55 × 34 =
  24. 24.45 × 30 =
  25. 25.55 × 12 =
  26. 26.15 × 36 =
  27. 27.20 × 15 =
  28. 28.65 × 34 =
  29. 29.15 × 8 =
  30. 30.55 × 34 =
  31. 31.125 × 24 =
  32. 32.28 × 55 =
  33. 33.45 × 14 =
  34. 34.35 × 12 =
  35. 35.125 × 28 =
  36. 36.25 × 18 =
  37. 37.125 × 26 =
  38. 38.16 × 35 =
  39. 39.26 × 35 =
  40. 40.75 × 18 =

Answer key

  1. 2200
  2. 1430
  3. 1530
  4. 1800
  5. 1950
  6. 660
  7. 2750
  8. 150
  9. 2550
  10. 240
  11. 4250
  12. 490
  13. 720
  14. 1320
  15. 420
  16. 1620
  17. 980
  18. 770
  19. 4500
  20. 780
  21. 5000
  22. 4000
  23. 1870
  24. 1350
  25. 660
  26. 540
  27. 300
  28. 2210
  29. 120
  30. 1870
  31. 3000
  32. 1540
  33. 630
  34. 420
  35. 3500
  36. 450
  37. 3250
  38. 560
  39. 910
  40. 1350

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