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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 228 · 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 × 14 =
  2. 2.65 × 12 =
  3. 3.125 × 24 =
  4. 4.65 × 26 =
  5. 5.22 × 75 =
  6. 6.35 × 24 =
  7. 7.125 × 26 =
  8. 8.55 × 20 =
  9. 9.20 × 55 =
  10. 10.15 × 24 =
  11. 11.75 × 30 =
  12. 12.26 × 125 =
  13. 13.15 × 22 =
  14. 14.35 × 8 =
  15. 15.45 × 14 =
  16. 16.35 × 14 =
  17. 17.65 × 6 =
  18. 18.75 × 40 =
  19. 19.75 × 22 =
  20. 20.18 × 35 =
  21. 21.24 × 65 =
  22. 22.38 × 15 =
  23. 23.8 × 35 =
  24. 24.6 × 125 =
  25. 25.10 × 15 =
  26. 26.34 × 15 =
  27. 27.15 × 18 =
  28. 28.15 × 22 =
  29. 29.35 × 8 =
  30. 30.22 × 75 =
  31. 31.25 × 10 =
  32. 32.15 × 8 =
  33. 33.55 × 30 =
  34. 34.28 × 25 =
  35. 35.14 × 55 =
  36. 36.14 × 75 =
  37. 37.25 × 20 =
  38. 38.6 × 25 =
  39. 39.24 × 15 =
  40. 40.15 × 12 =

Answer key

  1. 350
  2. 780
  3. 3000
  4. 1690
  5. 1650
  6. 840
  7. 3250
  8. 1100
  9. 1100
  10. 360
  11. 2250
  12. 3250
  13. 330
  14. 280
  15. 630
  16. 490
  17. 390
  18. 3000
  19. 1650
  20. 630
  21. 1560
  22. 570
  23. 280
  24. 750
  25. 150
  26. 510
  27. 270
  28. 330
  29. 280
  30. 1650
  31. 250
  32. 120
  33. 1650
  34. 700
  35. 770
  36. 1050
  37. 500
  38. 150
  39. 360
  40. 180

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