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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 529 · 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. 1.22 × 65 =
  2. 2.32 × 65 =
  3. 3.12 × 15 =
  4. 4.65 × 6 =
  5. 5.15 × 30 =
  6. 6.12 × 15 =
  7. 7.35 × 32 =
  8. 8.65 × 40 =
  9. 9.25 × 6 =
  10. 10.35 × 16 =
  11. 11.18 × 15 =
  12. 12.30 × 35 =
  13. 13.15 × 20 =
  14. 14.65 × 12 =
  15. 15.14 × 35 =
  16. 16.125 × 14 =
  17. 17.26 × 15 =
  18. 18.32 × 45 =
  19. 19.25 × 12 =
  20. 20.14 × 75 =
  21. 21.65 × 40 =
  22. 22.125 × 8 =
  23. 23.55 × 26 =
  24. 24.75 × 10 =
  25. 25.35 × 16 =
  26. 26.35 × 38 =
  27. 27.45 × 26 =
  28. 28.65 × 36 =
  29. 29.45 × 40 =
  30. 30.35 × 38 =
  31. 31.25 × 20 =
  32. 32.28 × 35 =
  33. 33.26 × 25 =
  34. 34.36 × 25 =
  35. 35.15 × 6 =
  36. 36.15 × 12 =
  37. 37.75 × 12 =
  38. 38.55 × 22 =
  39. 39.55 × 8 =
  40. 40.20 × 15 =

Answer key

  1. 1430
  2. 2080
  3. 180
  4. 390
  5. 450
  6. 180
  7. 1120
  8. 2600
  9. 150
  10. 560
  11. 270
  12. 1050
  13. 300
  14. 780
  15. 490
  16. 1750
  17. 390
  18. 1440
  19. 300
  20. 1050
  21. 2600
  22. 1000
  23. 1430
  24. 750
  25. 560
  26. 1330
  27. 1170
  28. 2340
  29. 1800
  30. 1330
  31. 500
  32. 980
  33. 650
  34. 900
  35. 90
  36. 180
  37. 900
  38. 1210
  39. 440
  40. 300

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