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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 494 · 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. 1.65 × 20 =
  2. 2.36 × 125 =
  3. 3.34 × 15 =
  4. 4.38 × 125 =
  5. 5.20 × 15 =
  6. 6.30 × 25 =
  7. 7.26 × 75 =
  8. 8.55 × 38 =
  9. 9.18 × 75 =
  10. 10.28 × 45 =
  11. 11.14 × 55 =
  12. 12.8 × 15 =
  13. 13.65 × 12 =
  14. 14.45 × 36 =
  15. 15.34 × 25 =
  16. 16.30 × 35 =
  17. 17.20 × 15 =
  18. 18.32 × 55 =
  19. 19.28 × 55 =
  20. 20.75 × 6 =
  21. 21.12 × 125 =
  22. 22.35 × 20 =
  23. 23.20 × 125 =
  24. 24.10 × 15 =
  25. 25.35 × 8 =
  26. 26.45 × 18 =
  27. 27.25 × 26 =
  28. 28.55 × 38 =
  29. 29.36 × 75 =
  30. 30.125 × 30 =
  31. 31.6 × 65 =
  32. 32.65 × 16 =
  33. 33.16 × 55 =
  34. 34.75 × 6 =
  35. 35.45 × 22 =
  36. 36.15 × 10 =
  37. 37.55 × 12 =
  38. 38.125 × 10 =
  39. 39.65 × 38 =
  40. 40.28 × 125 =

Answer key

  1. 1300
  2. 4500
  3. 510
  4. 4750
  5. 300
  6. 750
  7. 1950
  8. 2090
  9. 1350
  10. 1260
  11. 770
  12. 120
  13. 780
  14. 1620
  15. 850
  16. 1050
  17. 300
  18. 1760
  19. 1540
  20. 450
  21. 1500
  22. 700
  23. 2500
  24. 150
  25. 280
  26. 810
  27. 650
  28. 2090
  29. 2700
  30. 3750
  31. 390
  32. 1040
  33. 880
  34. 450
  35. 990
  36. 150
  37. 660
  38. 1250
  39. 2470
  40. 3500

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