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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 466 · 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. 1.55 × 12 =
  2. 2.45 × 36 =
  3. 3.55 × 10 =
  4. 4.55 × 28 =
  5. 5.65 × 14 =
  6. 6.65 × 18 =
  7. 7.25 × 12 =
  8. 8.6 × 75 =
  9. 9.8 × 45 =
  10. 10.65 × 16 =
  11. 11.35 × 20 =
  12. 12.20 × 125 =
  13. 13.125 × 32 =
  14. 14.35 × 10 =
  15. 15.30 × 15 =
  16. 16.6 × 65 =
  17. 17.12 × 125 =
  18. 18.34 × 125 =
  19. 19.30 × 125 =
  20. 20.35 × 20 =
  21. 21.12 × 75 =
  22. 22.40 × 35 =
  23. 23.15 × 24 =
  24. 24.22 × 15 =
  25. 25.30 × 125 =
  26. 26.25 × 28 =
  27. 27.35 × 14 =
  28. 28.10 × 15 =
  29. 29.8 × 125 =
  30. 30.14 × 75 =
  31. 31.125 × 14 =
  32. 32.26 × 55 =
  33. 33.36 × 15 =
  34. 34.35 × 8 =
  35. 35.26 × 25 =
  36. 36.36 × 55 =
  37. 37.40 × 125 =
  38. 38.35 × 28 =
  39. 39.15 × 38 =
  40. 40.14 × 65 =

Answer key

  1. 660
  2. 1620
  3. 550
  4. 1540
  5. 910
  6. 1170
  7. 300
  8. 450
  9. 360
  10. 1040
  11. 700
  12. 2500
  13. 4000
  14. 350
  15. 450
  16. 390
  17. 1500
  18. 4250
  19. 3750
  20. 700
  21. 900
  22. 1400
  23. 360
  24. 330
  25. 3750
  26. 700
  27. 490
  28. 150
  29. 1000
  30. 1050
  31. 1750
  32. 1430
  33. 540
  34. 280
  35. 650
  36. 1980
  37. 5000
  38. 980
  39. 570
  40. 910

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