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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 400 · 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. 1.35 × 6 =
  2. 2.75 × 16 =
  3. 3.55 × 32 =
  4. 4.55 × 24 =
  5. 5.14 × 75 =
  6. 6.25 × 6 =
  7. 7.35 × 6 =
  8. 8.75 × 6 =
  9. 9.10 × 125 =
  10. 10.14 × 45 =
  11. 11.55 × 8 =
  12. 12.65 × 12 =
  13. 13.32 × 35 =
  14. 14.36 × 45 =
  15. 15.26 × 15 =
  16. 16.15 × 22 =
  17. 17.22 × 125 =
  18. 18.65 × 34 =
  19. 19.20 × 125 =
  20. 20.75 × 36 =
  21. 21.35 × 8 =
  22. 22.35 × 12 =
  23. 23.75 × 22 =
  24. 24.35 × 38 =
  25. 25.14 × 125 =
  26. 26.26 × 15 =
  27. 27.20 × 25 =
  28. 28.12 × 45 =
  29. 29.28 × 25 =
  30. 30.8 × 65 =
  31. 31.40 × 75 =
  32. 32.15 × 30 =
  33. 33.35 × 14 =
  34. 34.65 × 8 =
  35. 35.16 × 65 =
  36. 36.75 × 38 =
  37. 37.75 × 34 =
  38. 38.18 × 125 =
  39. 39.75 × 30 =
  40. 40.125 × 10 =

Answer key

  1. 210
  2. 1200
  3. 1760
  4. 1320
  5. 1050
  6. 150
  7. 210
  8. 450
  9. 1250
  10. 630
  11. 440
  12. 780
  13. 1120
  14. 1620
  15. 390
  16. 330
  17. 2750
  18. 2210
  19. 2500
  20. 2700
  21. 280
  22. 420
  23. 1650
  24. 1330
  25. 1750
  26. 390
  27. 500
  28. 540
  29. 700
  30. 520
  31. 3000
  32. 450
  33. 490
  34. 520
  35. 1040
  36. 2850
  37. 2550
  38. 2250
  39. 2250
  40. 1250

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