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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 415 · 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. 1.16 × 15 =
  2. 2.25 × 36 =
  3. 3.25 × 28 =
  4. 4.18 × 15 =
  5. 5.36 × 45 =
  6. 6.55 × 12 =
  7. 7.25 × 14 =
  8. 8.32 × 25 =
  9. 9.45 × 30 =
  10. 10.18 × 15 =
  11. 11.15 × 34 =
  12. 12.35 × 12 =
  13. 13.34 × 55 =
  14. 14.55 × 32 =
  15. 15.125 × 22 =
  16. 16.6 × 45 =
  17. 17.55 × 34 =
  18. 18.40 × 55 =
  19. 19.30 × 75 =
  20. 20.125 × 14 =
  21. 21.35 × 10 =
  22. 22.125 × 6 =
  23. 23.34 × 35 =
  24. 24.35 × 18 =
  25. 25.10 × 75 =
  26. 26.36 × 75 =
  27. 27.25 × 12 =
  28. 28.45 × 20 =
  29. 29.75 × 6 =
  30. 30.40 × 35 =
  31. 31.8 × 55 =
  32. 32.38 × 125 =
  33. 33.26 × 15 =
  34. 34.35 × 6 =
  35. 35.26 × 125 =
  36. 36.6 × 75 =
  37. 37.25 × 26 =
  38. 38.16 × 15 =
  39. 39.15 × 38 =
  40. 40.20 × 15 =

Answer key

  1. 240
  2. 900
  3. 700
  4. 270
  5. 1620
  6. 660
  7. 350
  8. 800
  9. 1350
  10. 270
  11. 510
  12. 420
  13. 1870
  14. 1760
  15. 2750
  16. 270
  17. 1870
  18. 2200
  19. 2250
  20. 1750
  21. 350
  22. 750
  23. 1190
  24. 630
  25. 750
  26. 2700
  27. 300
  28. 900
  29. 450
  30. 1400
  31. 440
  32. 4750
  33. 390
  34. 210
  35. 3250
  36. 450
  37. 650
  38. 240
  39. 570
  40. 300

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