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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 453 · 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. 1.36 × 75 =
  2. 2.15 × 34 =
  3. 3.25 × 28 =
  4. 4.65 × 26 =
  5. 5.24 × 55 =
  6. 6.20 × 35 =
  7. 7.15 × 40 =
  8. 8.30 × 25 =
  9. 9.65 × 30 =
  10. 10.40 × 125 =
  11. 11.6 × 75 =
  12. 12.22 × 15 =
  13. 13.55 × 26 =
  14. 14.26 × 65 =
  15. 15.22 × 25 =
  16. 16.35 × 8 =
  17. 17.6 × 35 =
  18. 18.125 × 12 =
  19. 19.15 × 22 =
  20. 20.12 × 25 =
  21. 21.24 × 45 =
  22. 22.26 × 65 =
  23. 23.18 × 125 =
  24. 24.35 × 30 =
  25. 25.125 × 30 =
  26. 26.20 × 45 =
  27. 27.55 × 6 =
  28. 28.25 × 10 =
  29. 29.25 × 8 =
  30. 30.45 × 32 =
  31. 31.14 × 65 =
  32. 32.125 × 24 =
  33. 33.75 × 34 =
  34. 34.36 × 125 =
  35. 35.22 × 45 =
  36. 36.6 × 75 =
  37. 37.125 × 22 =
  38. 38.35 × 24 =
  39. 39.8 × 75 =
  40. 40.10 × 65 =

Answer key

  1. 2700
  2. 510
  3. 700
  4. 1690
  5. 1320
  6. 700
  7. 600
  8. 750
  9. 1950
  10. 5000
  11. 450
  12. 330
  13. 1430
  14. 1690
  15. 550
  16. 280
  17. 210
  18. 1500
  19. 330
  20. 300
  21. 1080
  22. 1690
  23. 2250
  24. 1050
  25. 3750
  26. 900
  27. 330
  28. 250
  29. 200
  30. 1440
  31. 910
  32. 3000
  33. 2550
  34. 4500
  35. 990
  36. 450
  37. 2750
  38. 840
  39. 600
  40. 650

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