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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 625 · 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. 1.65 × 24 =
  2. 2.25 × 6 =
  3. 3.15 × 12 =
  4. 4.6 × 35 =
  5. 5.20 × 45 =
  6. 6.55 × 6 =
  7. 7.45 × 18 =
  8. 8.125 × 34 =
  9. 9.8 × 55 =
  10. 10.45 × 12 =
  11. 11.25 × 36 =
  12. 12.34 × 25 =
  13. 13.8 × 35 =
  14. 14.22 × 125 =
  15. 15.125 × 8 =
  16. 16.45 × 36 =
  17. 17.15 × 22 =
  18. 18.25 × 14 =
  19. 19.28 × 15 =
  20. 20.8 × 65 =
  21. 21.15 × 36 =
  22. 22.6 × 25 =
  23. 23.55 × 28 =
  24. 24.25 × 28 =
  25. 25.35 × 28 =
  26. 26.65 × 18 =
  27. 27.25 × 20 =
  28. 28.125 × 10 =
  29. 29.12 × 55 =
  30. 30.55 × 30 =
  31. 31.15 × 10 =
  32. 32.125 × 10 =
  33. 33.20 × 55 =
  34. 34.28 × 35 =
  35. 35.18 × 35 =
  36. 36.14 × 45 =
  37. 37.38 × 35 =
  38. 38.38 × 25 =
  39. 39.15 × 8 =
  40. 40.14 × 25 =

Answer key

  1. 1560
  2. 150
  3. 180
  4. 210
  5. 900
  6. 330
  7. 810
  8. 4250
  9. 440
  10. 540
  11. 900
  12. 850
  13. 280
  14. 2750
  15. 1000
  16. 1620
  17. 330
  18. 350
  19. 420
  20. 520
  21. 540
  22. 150
  23. 1540
  24. 700
  25. 980
  26. 1170
  27. 500
  28. 1250
  29. 660
  30. 1650
  31. 150
  32. 1250
  33. 1100
  34. 980
  35. 630
  36. 630
  37. 1330
  38. 950
  39. 120
  40. 350

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