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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 238 · 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. 1.125 × 10 =
  2. 2.45 × 30 =
  3. 3.30 × 55 =
  4. 4.12 × 35 =
  5. 5.15 × 10 =
  6. 6.55 × 28 =
  7. 7.35 × 38 =
  8. 8.75 × 12 =
  9. 9.125 × 38 =
  10. 10.65 × 24 =
  11. 11.20 × 25 =
  12. 12.125 × 30 =
  13. 13.6 × 55 =
  14. 14.12 × 45 =
  15. 15.18 × 65 =
  16. 16.15 × 14 =
  17. 17.8 × 35 =
  18. 18.16 × 15 =
  19. 19.22 × 75 =
  20. 20.125 × 24 =
  21. 21.20 × 25 =
  22. 22.8 × 35 =
  23. 23.25 × 8 =
  24. 24.30 × 35 =
  25. 25.15 × 36 =
  26. 26.75 × 32 =
  27. 27.45 × 18 =
  28. 28.65 × 20 =
  29. 29.40 × 25 =
  30. 30.16 × 125 =
  31. 31.34 × 25 =
  32. 32.55 × 14 =
  33. 33.15 × 32 =
  34. 34.34 × 35 =
  35. 35.65 × 20 =
  36. 36.38 × 25 =
  37. 37.35 × 20 =
  38. 38.75 × 40 =
  39. 39.6 × 35 =
  40. 40.65 × 40 =

Answer key

  1. 1250
  2. 1350
  3. 1650
  4. 420
  5. 150
  6. 1540
  7. 1330
  8. 900
  9. 4750
  10. 1560
  11. 500
  12. 3750
  13. 330
  14. 540
  15. 1170
  16. 210
  17. 280
  18. 240
  19. 1650
  20. 3000
  21. 500
  22. 280
  23. 200
  24. 1050
  25. 540
  26. 2400
  27. 810
  28. 1300
  29. 1000
  30. 2000
  31. 850
  32. 770
  33. 480
  34. 1190
  35. 1300
  36. 950
  37. 700
  38. 3000
  39. 210
  40. 2600

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