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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 330 · 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 × 14 =
  2. 2.25 × 10 =
  3. 3.125 × 32 =
  4. 4.125 × 34 =
  5. 5.15 × 40 =
  6. 6.35 × 32 =
  7. 7.15 × 14 =
  8. 8.6 × 55 =
  9. 9.25 × 24 =
  10. 10.75 × 24 =
  11. 11.18 × 75 =
  12. 12.28 × 65 =
  13. 13.12 × 45 =
  14. 14.15 × 40 =
  15. 15.10 × 75 =
  16. 16.8 × 25 =
  17. 17.45 × 6 =
  18. 18.12 × 25 =
  19. 19.24 × 15 =
  20. 20.125 × 30 =
  21. 21.125 × 8 =
  22. 22.55 × 40 =
  23. 23.55 × 24 =
  24. 24.15 × 10 =
  25. 25.55 × 16 =
  26. 26.55 × 18 =
  27. 27.25 × 24 =
  28. 28.35 × 14 =
  29. 29.22 × 15 =
  30. 30.10 × 65 =
  31. 31.18 × 45 =
  32. 32.15 × 36 =
  33. 33.125 × 20 =
  34. 34.65 × 38 =
  35. 35.36 × 25 =
  36. 36.16 × 55 =
  37. 37.40 × 15 =
  38. 38.32 × 45 =
  39. 39.25 × 26 =
  40. 40.15 × 10 =

Answer key

  1. 210
  2. 250
  3. 4000
  4. 4250
  5. 600
  6. 1120
  7. 210
  8. 330
  9. 600
  10. 1800
  11. 1350
  12. 1820
  13. 540
  14. 600
  15. 750
  16. 200
  17. 270
  18. 300
  19. 360
  20. 3750
  21. 1000
  22. 2200
  23. 1320
  24. 150
  25. 880
  26. 990
  27. 600
  28. 490
  29. 330
  30. 650
  31. 810
  32. 540
  33. 2500
  34. 2470
  35. 900
  36. 880
  37. 600
  38. 1440
  39. 650
  40. 150

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