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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 666 · 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. 1.55 × 36 =
  2. 2.14 × 15 =
  3. 3.125 × 8 =
  4. 4.15 × 28 =
  5. 5.25 × 6 =
  6. 6.125 × 30 =
  7. 7.20 × 55 =
  8. 8.45 × 26 =
  9. 9.15 × 18 =
  10. 10.10 × 45 =
  11. 11.15 × 20 =
  12. 12.40 × 25 =
  13. 13.25 × 36 =
  14. 14.65 × 26 =
  15. 15.35 × 34 =
  16. 16.15 × 10 =
  17. 17.45 × 24 =
  18. 18.38 × 55 =
  19. 19.10 × 55 =
  20. 20.14 × 65 =
  21. 21.16 × 25 =
  22. 22.18 × 125 =
  23. 23.75 × 40 =
  24. 24.30 × 55 =
  25. 25.35 × 18 =
  26. 26.26 × 65 =
  27. 27.8 × 15 =
  28. 28.26 × 15 =
  29. 29.65 × 34 =
  30. 30.30 × 15 =
  31. 31.35 × 22 =
  32. 32.25 × 16 =
  33. 33.15 × 36 =
  34. 34.35 × 6 =
  35. 35.28 × 75 =
  36. 36.65 × 12 =
  37. 37.20 × 55 =
  38. 38.16 × 45 =
  39. 39.30 × 35 =
  40. 40.125 × 6 =

Answer key

  1. 1980
  2. 210
  3. 1000
  4. 420
  5. 150
  6. 3750
  7. 1100
  8. 1170
  9. 270
  10. 450
  11. 300
  12. 1000
  13. 900
  14. 1690
  15. 1190
  16. 150
  17. 1080
  18. 2090
  19. 550
  20. 910
  21. 400
  22. 2250
  23. 3000
  24. 1650
  25. 630
  26. 1690
  27. 120
  28. 390
  29. 2210
  30. 450
  31. 770
  32. 400
  33. 540
  34. 210
  35. 2100
  36. 780
  37. 1100
  38. 720
  39. 1050
  40. 750

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