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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 875 · 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. 1.15 × 22 =
  2. 2.22 × 125 =
  3. 3.6 × 45 =
  4. 4.12 × 15 =
  5. 5.125 × 6 =
  6. 6.45 × 6 =
  7. 7.55 × 8 =
  8. 8.25 × 12 =
  9. 9.35 × 6 =
  10. 10.32 × 75 =
  11. 11.125 × 8 =
  12. 12.10 × 35 =
  13. 13.8 × 65 =
  14. 14.15 × 14 =
  15. 15.75 × 8 =
  16. 16.28 × 15 =
  17. 17.45 × 18 =
  18. 18.32 × 45 =
  19. 19.125 × 22 =
  20. 20.18 × 35 =
  21. 21.12 × 75 =
  22. 22.14 × 15 =
  23. 23.16 × 25 =
  24. 24.15 × 18 =
  25. 25.65 × 20 =
  26. 26.25 × 22 =
  27. 27.45 × 24 =
  28. 28.35 × 14 =
  29. 29.28 × 15 =
  30. 30.26 × 75 =
  31. 31.15 × 10 =
  32. 32.28 × 25 =
  33. 33.65 × 32 =
  34. 34.45 × 36 =
  35. 35.125 × 8 =
  36. 36.22 × 125 =
  37. 37.34 × 15 =
  38. 38.10 × 125 =
  39. 39.65 × 8 =
  40. 40.22 × 35 =

Answer key

  1. 330
  2. 2750
  3. 270
  4. 180
  5. 750
  6. 270
  7. 440
  8. 300
  9. 210
  10. 2400
  11. 1000
  12. 350
  13. 520
  14. 210
  15. 600
  16. 420
  17. 810
  18. 1440
  19. 2750
  20. 630
  21. 900
  22. 210
  23. 400
  24. 270
  25. 1300
  26. 550
  27. 1080
  28. 490
  29. 420
  30. 1950
  31. 150
  32. 700
  33. 2080
  34. 1620
  35. 1000
  36. 2750
  37. 510
  38. 1250
  39. 520
  40. 770

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