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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 636 · 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. 1.35 × 22 =
  2. 2.65 × 28 =
  3. 3.8 × 75 =
  4. 4.40 × 15 =
  5. 5.38 × 125 =
  6. 6.18 × 15 =
  7. 7.65 × 40 =
  8. 8.125 × 36 =
  9. 9.24 × 65 =
  10. 10.55 × 28 =
  11. 11.22 × 45 =
  12. 12.65 × 8 =
  13. 13.10 × 25 =
  14. 14.75 × 32 =
  15. 15.18 × 45 =
  16. 16.125 × 24 =
  17. 17.15 × 20 =
  18. 18.65 × 16 =
  19. 19.12 × 75 =
  20. 20.8 × 125 =
  21. 21.25 × 14 =
  22. 22.125 × 22 =
  23. 23.20 × 75 =
  24. 24.38 × 15 =
  25. 25.24 × 45 =
  26. 26.55 × 10 =
  27. 27.35 × 30 =
  28. 28.36 × 125 =
  29. 29.25 × 30 =
  30. 30.55 × 36 =
  31. 31.20 × 45 =
  32. 32.10 × 125 =
  33. 33.125 × 40 =
  34. 34.20 × 25 =
  35. 35.45 × 14 =
  36. 36.125 × 12 =
  37. 37.20 × 125 =
  38. 38.35 × 18 =
  39. 39.34 × 15 =
  40. 40.14 × 65 =

Answer key

  1. 770
  2. 1820
  3. 600
  4. 600
  5. 4750
  6. 270
  7. 2600
  8. 4500
  9. 1560
  10. 1540
  11. 990
  12. 520
  13. 250
  14. 2400
  15. 810
  16. 3000
  17. 300
  18. 1040
  19. 900
  20. 1000
  21. 350
  22. 2750
  23. 1500
  24. 570
  25. 1080
  26. 550
  27. 1050
  28. 4500
  29. 750
  30. 1980
  31. 900
  32. 1250
  33. 5000
  34. 500
  35. 630
  36. 1500
  37. 2500
  38. 630
  39. 510
  40. 910

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