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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 245 · 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 × 34 =
  2. 2.8 × 15 =
  3. 3.25 × 32 =
  4. 4.15 × 16 =
  5. 5.75 × 38 =
  6. 6.15 × 22 =
  7. 7.125 × 14 =
  8. 8.45 × 6 =
  9. 9.25 × 14 =
  10. 10.125 × 12 =
  11. 11.35 × 26 =
  12. 12.45 × 10 =
  13. 13.40 × 55 =
  14. 14.55 × 32 =
  15. 15.25 × 28 =
  16. 16.38 × 125 =
  17. 17.35 × 14 =
  18. 18.125 × 20 =
  19. 19.24 × 35 =
  20. 20.45 × 18 =
  21. 21.8 × 25 =
  22. 22.25 × 24 =
  23. 23.125 × 26 =
  24. 24.75 × 16 =
  25. 25.35 × 12 =
  26. 26.36 × 35 =
  27. 27.34 × 125 =
  28. 28.18 × 25 =
  29. 29.35 × 40 =
  30. 30.75 × 40 =
  31. 31.45 × 16 =
  32. 32.34 × 75 =
  33. 33.25 × 40 =
  34. 34.36 × 65 =
  35. 35.32 × 35 =
  36. 36.75 × 24 =
  37. 37.15 × 6 =
  38. 38.12 × 45 =
  39. 39.35 × 18 =
  40. 40.15 × 40 =

Answer key

  1. 510
  2. 120
  3. 800
  4. 240
  5. 2850
  6. 330
  7. 1750
  8. 270
  9. 350
  10. 1500
  11. 910
  12. 450
  13. 2200
  14. 1760
  15. 700
  16. 4750
  17. 490
  18. 2500
  19. 840
  20. 810
  21. 200
  22. 600
  23. 3250
  24. 1200
  25. 420
  26. 1260
  27. 4250
  28. 450
  29. 1400
  30. 3000
  31. 720
  32. 2550
  33. 1000
  34. 2340
  35. 1120
  36. 1800
  37. 90
  38. 540
  39. 630
  40. 600

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