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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 140 · 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 × 28 =
  2. 2.22 × 45 =
  3. 3.35 × 14 =
  4. 4.6 × 25 =
  5. 5.30 × 55 =
  6. 6.20 × 75 =
  7. 7.20 × 125 =
  8. 8.15 × 6 =
  9. 9.65 × 6 =
  10. 10.75 × 6 =
  11. 11.25 × 40 =
  12. 12.55 × 32 =
  13. 13.12 × 15 =
  14. 14.15 × 18 =
  15. 15.22 × 125 =
  16. 16.14 × 15 =
  17. 17.8 × 125 =
  18. 18.14 × 55 =
  19. 19.55 × 6 =
  20. 20.18 × 15 =
  21. 21.8 × 75 =
  22. 22.15 × 26 =
  23. 23.35 × 12 =
  24. 24.45 × 30 =
  25. 25.22 × 65 =
  26. 26.20 × 25 =
  27. 27.14 × 35 =
  28. 28.125 × 12 =
  29. 29.25 × 26 =
  30. 30.45 × 30 =
  31. 31.34 × 15 =
  32. 32.55 × 38 =
  33. 33.25 × 12 =
  34. 34.45 × 20 =
  35. 35.14 × 15 =
  36. 36.15 × 8 =
  37. 37.35 × 16 =
  38. 38.125 × 38 =
  39. 39.55 × 18 =
  40. 40.75 × 12 =

Answer key

  1. 700
  2. 990
  3. 490
  4. 150
  5. 1650
  6. 1500
  7. 2500
  8. 90
  9. 390
  10. 450
  11. 1000
  12. 1760
  13. 180
  14. 270
  15. 2750
  16. 210
  17. 1000
  18. 770
  19. 330
  20. 270
  21. 600
  22. 390
  23. 420
  24. 1350
  25. 1430
  26. 500
  27. 490
  28. 1500
  29. 650
  30. 1350
  31. 510
  32. 2090
  33. 300
  34. 900
  35. 210
  36. 120
  37. 560
  38. 4750
  39. 990
  40. 900

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