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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 978 · 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. 1.45 × 40 =
  2. 2.38 × 15 =
  3. 3.65 × 6 =
  4. 4.15 × 30 =
  5. 5.25 × 14 =
  6. 6.15 × 16 =
  7. 7.40 × 45 =
  8. 8.25 × 32 =
  9. 9.28 × 25 =
  10. 10.65 × 38 =
  11. 11.25 × 30 =
  12. 12.15 × 32 =
  13. 13.8 × 75 =
  14. 14.15 × 34 =
  15. 15.15 × 12 =
  16. 16.35 × 36 =
  17. 17.30 × 55 =
  18. 18.12 × 25 =
  19. 19.35 × 20 =
  20. 20.16 × 25 =
  21. 21.34 × 45 =
  22. 22.18 × 75 =
  23. 23.22 × 35 =
  24. 24.25 × 14 =
  25. 25.38 × 35 =
  26. 26.75 × 24 =
  27. 27.65 × 24 =
  28. 28.20 × 125 =
  29. 29.8 × 15 =
  30. 30.18 × 125 =
  31. 31.75 × 38 =
  32. 32.25 × 10 =
  33. 33.125 × 10 =
  34. 34.25 × 20 =
  35. 35.22 × 55 =
  36. 36.14 × 125 =
  37. 37.10 × 65 =
  38. 38.12 × 55 =
  39. 39.15 × 10 =
  40. 40.45 × 18 =

Answer key

  1. 1800
  2. 570
  3. 390
  4. 450
  5. 350
  6. 240
  7. 1800
  8. 800
  9. 700
  10. 2470
  11. 750
  12. 480
  13. 600
  14. 510
  15. 180
  16. 1260
  17. 1650
  18. 300
  19. 700
  20. 400
  21. 1530
  22. 1350
  23. 770
  24. 350
  25. 1330
  26. 1800
  27. 1560
  28. 2500
  29. 120
  30. 2250
  31. 2850
  32. 250
  33. 1250
  34. 500
  35. 1210
  36. 1750
  37. 650
  38. 660
  39. 150
  40. 810

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