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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 66 · 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. 1.40 × 65 =
  2. 2.35 × 22 =
  3. 3.12 × 65 =
  4. 4.15 × 10 =
  5. 5.125 × 28 =
  6. 6.75 × 16 =
  7. 7.10 × 45 =
  8. 8.35 × 16 =
  9. 9.22 × 75 =
  10. 10.55 × 12 =
  11. 11.35 × 36 =
  12. 12.55 × 24 =
  13. 13.25 × 20 =
  14. 14.36 × 75 =
  15. 15.125 × 24 =
  16. 16.125 × 14 =
  17. 17.65 × 18 =
  18. 18.22 × 15 =
  19. 19.25 × 12 =
  20. 20.125 × 24 =
  21. 21.26 × 15 =
  22. 22.12 × 125 =
  23. 23.125 × 32 =
  24. 24.14 × 65 =
  25. 25.16 × 55 =
  26. 26.65 × 10 =
  27. 27.10 × 75 =
  28. 28.34 × 25 =
  29. 29.125 × 30 =
  30. 30.75 × 18 =
  31. 31.26 × 35 =
  32. 32.24 × 35 =
  33. 33.8 × 75 =
  34. 34.55 × 10 =
  35. 35.75 × 30 =
  36. 36.55 × 24 =
  37. 37.55 × 40 =
  38. 38.14 × 125 =
  39. 39.45 × 8 =
  40. 40.22 × 125 =

Answer key

  1. 2600
  2. 770
  3. 780
  4. 150
  5. 3500
  6. 1200
  7. 450
  8. 560
  9. 1650
  10. 660
  11. 1260
  12. 1320
  13. 500
  14. 2700
  15. 3000
  16. 1750
  17. 1170
  18. 330
  19. 300
  20. 3000
  21. 390
  22. 1500
  23. 4000
  24. 910
  25. 880
  26. 650
  27. 750
  28. 850
  29. 3750
  30. 1350
  31. 910
  32. 840
  33. 600
  34. 550
  35. 2250
  36. 1320
  37. 2200
  38. 1750
  39. 360
  40. 2750

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