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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 554 · 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. 1.75 × 36 =
  2. 2.35 × 34 =
  3. 3.45 × 34 =
  4. 4.45 × 14 =
  5. 5.20 × 35 =
  6. 6.14 × 125 =
  7. 7.14 × 15 =
  8. 8.15 × 20 =
  9. 9.75 × 32 =
  10. 10.16 × 75 =
  11. 11.14 × 65 =
  12. 12.65 × 22 =
  13. 13.10 × 55 =
  14. 14.30 × 35 =
  15. 15.15 × 16 =
  16. 16.35 × 20 =
  17. 17.15 × 26 =
  18. 18.38 × 125 =
  19. 19.14 × 35 =
  20. 20.55 × 8 =
  21. 21.32 × 35 =
  22. 22.75 × 18 =
  23. 23.40 × 15 =
  24. 24.55 × 10 =
  25. 25.36 × 45 =
  26. 26.32 × 45 =
  27. 27.15 × 30 =
  28. 28.20 × 125 =
  29. 29.16 × 55 =
  30. 30.55 × 28 =
  31. 31.125 × 34 =
  32. 32.65 × 32 =
  33. 33.32 × 125 =
  34. 34.15 × 6 =
  35. 35.15 × 26 =
  36. 36.16 × 65 =
  37. 37.10 × 25 =
  38. 38.12 × 45 =
  39. 39.65 × 38 =
  40. 40.35 × 10 =

Answer key

  1. 2700
  2. 1190
  3. 1530
  4. 630
  5. 700
  6. 1750
  7. 210
  8. 300
  9. 2400
  10. 1200
  11. 910
  12. 1430
  13. 550
  14. 1050
  15. 240
  16. 700
  17. 390
  18. 4750
  19. 490
  20. 440
  21. 1120
  22. 1350
  23. 600
  24. 550
  25. 1620
  26. 1440
  27. 450
  28. 2500
  29. 880
  30. 1540
  31. 4250
  32. 2080
  33. 4000
  34. 90
  35. 390
  36. 1040
  37. 250
  38. 540
  39. 2470
  40. 350

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