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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 325 · 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. 1.8 × 55 =
  2. 2.65 × 34 =
  3. 3.75 × 26 =
  4. 4.55 × 8 =
  5. 5.34 × 55 =
  6. 6.55 × 6 =
  7. 7.12 × 25 =
  8. 8.40 × 25 =
  9. 9.30 × 75 =
  10. 10.18 × 15 =
  11. 11.24 × 45 =
  12. 12.55 × 32 =
  13. 13.125 × 14 =
  14. 14.36 × 65 =
  15. 15.35 × 32 =
  16. 16.10 × 55 =
  17. 17.14 × 45 =
  18. 18.16 × 125 =
  19. 19.14 × 55 =
  20. 20.75 × 40 =
  21. 21.65 × 16 =
  22. 22.45 × 6 =
  23. 23.24 × 35 =
  24. 24.55 × 40 =
  25. 25.45 × 10 =
  26. 26.75 × 32 =
  27. 27.75 × 10 =
  28. 28.10 × 45 =
  29. 29.26 × 125 =
  30. 30.40 × 45 =
  31. 31.40 × 65 =
  32. 32.18 × 15 =
  33. 33.15 × 34 =
  34. 34.15 × 10 =
  35. 35.16 × 125 =
  36. 36.18 × 75 =
  37. 37.26 × 15 =
  38. 38.65 × 14 =
  39. 39.45 × 16 =
  40. 40.15 × 20 =

Answer key

  1. 440
  2. 2210
  3. 1950
  4. 440
  5. 1870
  6. 330
  7. 300
  8. 1000
  9. 2250
  10. 270
  11. 1080
  12. 1760
  13. 1750
  14. 2340
  15. 1120
  16. 550
  17. 630
  18. 2000
  19. 770
  20. 3000
  21. 1040
  22. 270
  23. 840
  24. 2200
  25. 450
  26. 2400
  27. 750
  28. 450
  29. 3250
  30. 1800
  31. 2600
  32. 270
  33. 510
  34. 150
  35. 2000
  36. 1350
  37. 390
  38. 910
  39. 720
  40. 300

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