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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 930 · 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 × 14 =
  2. 2.16 × 35 =
  3. 3.75 × 34 =
  4. 4.45 × 32 =
  5. 5.45 × 20 =
  6. 6.35 × 10 =
  7. 7.10 × 35 =
  8. 8.14 × 75 =
  9. 9.40 × 75 =
  10. 10.55 × 26 =
  11. 11.65 × 8 =
  12. 12.20 × 15 =
  13. 13.22 × 45 =
  14. 14.18 × 55 =
  15. 15.36 × 75 =
  16. 16.45 × 40 =
  17. 17.24 × 45 =
  18. 18.30 × 15 =
  19. 19.25 × 14 =
  20. 20.6 × 15 =
  21. 21.15 × 12 =
  22. 22.15 × 22 =
  23. 23.75 × 32 =
  24. 24.125 × 32 =
  25. 25.75 × 16 =
  26. 26.35 × 26 =
  27. 27.35 × 28 =
  28. 28.65 × 32 =
  29. 29.15 × 8 =
  30. 30.8 × 45 =
  31. 31.20 × 35 =
  32. 32.75 × 24 =
  33. 33.18 × 65 =
  34. 34.65 × 16 =
  35. 35.45 × 30 =
  36. 36.15 × 40 =
  37. 37.125 × 32 =
  38. 38.24 × 45 =
  39. 39.32 × 25 =
  40. 40.15 × 36 =

Answer key

  1. 210
  2. 560
  3. 2550
  4. 1440
  5. 900
  6. 350
  7. 350
  8. 1050
  9. 3000
  10. 1430
  11. 520
  12. 300
  13. 990
  14. 990
  15. 2700
  16. 1800
  17. 1080
  18. 450
  19. 350
  20. 90
  21. 180
  22. 330
  23. 2400
  24. 4000
  25. 1200
  26. 910
  27. 980
  28. 2080
  29. 120
  30. 360
  31. 700
  32. 1800
  33. 1170
  34. 1040
  35. 1350
  36. 600
  37. 4000
  38. 1080
  39. 800
  40. 540

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