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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 543 · 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 × 16 =
  2. 2.35 × 8 =
  3. 3.20 × 75 =
  4. 4.125 × 16 =
  5. 5.6 × 65 =
  6. 6.65 × 34 =
  7. 7.55 × 30 =
  8. 8.125 × 10 =
  9. 9.55 × 8 =
  10. 10.26 × 15 =
  11. 11.24 × 125 =
  12. 12.55 × 30 =
  13. 13.35 × 8 =
  14. 14.15 × 30 =
  15. 15.24 × 125 =
  16. 16.45 × 36 =
  17. 17.55 × 12 =
  18. 18.32 × 55 =
  19. 19.18 × 45 =
  20. 20.45 × 24 =
  21. 21.26 × 25 =
  22. 22.18 × 75 =
  23. 23.38 × 15 =
  24. 24.26 × 15 =
  25. 25.20 × 65 =
  26. 26.30 × 25 =
  27. 27.28 × 25 =
  28. 28.8 × 25 =
  29. 29.26 × 75 =
  30. 30.32 × 45 =
  31. 31.10 × 15 =
  32. 32.35 × 16 =
  33. 33.45 × 20 =
  34. 34.125 × 6 =
  35. 35.35 × 6 =
  36. 36.125 × 12 =
  37. 37.10 × 35 =
  38. 38.35 × 36 =
  39. 39.55 × 24 =
  40. 40.65 × 34 =

Answer key

  1. 400
  2. 280
  3. 1500
  4. 2000
  5. 390
  6. 2210
  7. 1650
  8. 1250
  9. 440
  10. 390
  11. 3000
  12. 1650
  13. 280
  14. 450
  15. 3000
  16. 1620
  17. 660
  18. 1760
  19. 810
  20. 1080
  21. 650
  22. 1350
  23. 570
  24. 390
  25. 1300
  26. 750
  27. 700
  28. 200
  29. 1950
  30. 1440
  31. 150
  32. 560
  33. 900
  34. 750
  35. 210
  36. 1500
  37. 350
  38. 1260
  39. 1320
  40. 2210

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