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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 544 · 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 × 26 =
  2. 2.20 × 35 =
  3. 3.25 × 14 =
  4. 4.35 × 12 =
  5. 5.45 × 40 =
  6. 6.15 × 40 =
  7. 7.15 × 22 =
  8. 8.40 × 45 =
  9. 9.55 × 12 =
  10. 10.65 × 40 =
  11. 11.40 × 65 =
  12. 12.15 × 34 =
  13. 13.65 × 10 =
  14. 14.45 × 14 =
  15. 15.20 × 45 =
  16. 16.35 × 20 =
  17. 17.30 × 35 =
  18. 18.35 × 14 =
  19. 19.24 × 65 =
  20. 20.125 × 40 =
  21. 21.34 × 55 =
  22. 22.55 × 22 =
  23. 23.34 × 45 =
  24. 24.8 × 65 =
  25. 25.14 × 45 =
  26. 26.125 × 8 =
  27. 27.25 × 40 =
  28. 28.14 × 15 =
  29. 29.8 × 55 =
  30. 30.22 × 25 =
  31. 31.55 × 12 =
  32. 32.18 × 75 =
  33. 33.40 × 15 =
  34. 34.32 × 125 =
  35. 35.125 × 6 =
  36. 36.30 × 45 =
  37. 37.125 × 8 =
  38. 38.75 × 34 =
  39. 39.25 × 12 =
  40. 40.15 × 12 =

Answer key

  1. 390
  2. 700
  3. 350
  4. 420
  5. 1800
  6. 600
  7. 330
  8. 1800
  9. 660
  10. 2600
  11. 2600
  12. 510
  13. 650
  14. 630
  15. 900
  16. 700
  17. 1050
  18. 490
  19. 1560
  20. 5000
  21. 1870
  22. 1210
  23. 1530
  24. 520
  25. 630
  26. 1000
  27. 1000
  28. 210
  29. 440
  30. 550
  31. 660
  32. 1350
  33. 600
  34. 4000
  35. 750
  36. 1350
  37. 1000
  38. 2550
  39. 300
  40. 180

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