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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 910 · 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 × 38 =
  2. 2.20 × 45 =
  3. 3.15 × 28 =
  4. 4.36 × 75 =
  5. 5.25 × 38 =
  6. 6.18 × 65 =
  7. 7.65 × 28 =
  8. 8.35 × 36 =
  9. 9.36 × 125 =
  10. 10.15 × 28 =
  11. 11.15 × 8 =
  12. 12.24 × 15 =
  13. 13.15 × 38 =
  14. 14.8 × 45 =
  15. 15.75 × 14 =
  16. 16.8 × 25 =
  17. 17.26 × 125 =
  18. 18.14 × 15 =
  19. 19.40 × 25 =
  20. 20.10 × 15 =
  21. 21.36 × 45 =
  22. 22.36 × 125 =
  23. 23.45 × 14 =
  24. 24.65 × 26 =
  25. 25.35 × 16 =
  26. 26.35 × 12 =
  27. 27.75 × 8 =
  28. 28.35 × 40 =
  29. 29.45 × 36 =
  30. 30.25 × 28 =
  31. 31.10 × 25 =
  32. 32.22 × 15 =
  33. 33.40 × 15 =
  34. 34.14 × 25 =
  35. 35.40 × 65 =
  36. 36.8 × 25 =
  37. 37.30 × 15 =
  38. 38.12 × 65 =
  39. 39.25 × 34 =
  40. 40.40 × 65 =

Answer key

  1. 570
  2. 900
  3. 420
  4. 2700
  5. 950
  6. 1170
  7. 1820
  8. 1260
  9. 4500
  10. 420
  11. 120
  12. 360
  13. 570
  14. 360
  15. 1050
  16. 200
  17. 3250
  18. 210
  19. 1000
  20. 150
  21. 1620
  22. 4500
  23. 630
  24. 1690
  25. 560
  26. 420
  27. 600
  28. 1400
  29. 1620
  30. 700
  31. 250
  32. 330
  33. 600
  34. 350
  35. 2600
  36. 200
  37. 450
  38. 780
  39. 850
  40. 2600

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