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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 714 · 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. 1.15 × 20 =
  2. 2.26 × 55 =
  3. 3.34 × 45 =
  4. 4.45 × 8 =
  5. 5.125 × 36 =
  6. 6.35 × 16 =
  7. 7.30 × 55 =
  8. 8.6 × 75 =
  9. 9.75 × 18 =
  10. 10.125 × 30 =
  11. 11.25 × 16 =
  12. 12.40 × 15 =
  13. 13.18 × 125 =
  14. 14.45 × 36 =
  15. 15.6 × 55 =
  16. 16.34 × 15 =
  17. 17.24 × 45 =
  18. 18.125 × 28 =
  19. 19.18 × 45 =
  20. 20.25 × 8 =
  21. 21.125 × 36 =
  22. 22.35 × 28 =
  23. 23.25 × 36 =
  24. 24.25 × 22 =
  25. 25.10 × 15 =
  26. 26.75 × 14 =
  27. 27.28 × 55 =
  28. 28.20 × 25 =
  29. 29.8 × 25 =
  30. 30.26 × 75 =
  31. 31.45 × 12 =
  32. 32.14 × 45 =
  33. 33.32 × 65 =
  34. 34.15 × 40 =
  35. 35.125 × 10 =
  36. 36.34 × 45 =
  37. 37.45 × 14 =
  38. 38.12 × 35 =
  39. 39.125 × 24 =
  40. 40.55 × 34 =

Answer key

  1. 300
  2. 1430
  3. 1530
  4. 360
  5. 4500
  6. 560
  7. 1650
  8. 450
  9. 1350
  10. 3750
  11. 400
  12. 600
  13. 2250
  14. 1620
  15. 330
  16. 510
  17. 1080
  18. 3500
  19. 810
  20. 200
  21. 4500
  22. 980
  23. 900
  24. 550
  25. 150
  26. 1050
  27. 1540
  28. 500
  29. 200
  30. 1950
  31. 540
  32. 630
  33. 2080
  34. 600
  35. 1250
  36. 1530
  37. 630
  38. 420
  39. 3000
  40. 1870

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