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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 865 · 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. 1.18 × 45 =
  2. 2.14 × 25 =
  3. 3.35 × 20 =
  4. 4.36 × 35 =
  5. 5.6 × 125 =
  6. 6.12 × 75 =
  7. 7.34 × 25 =
  8. 8.45 × 10 =
  9. 9.14 × 15 =
  10. 10.14 × 65 =
  11. 11.6 × 35 =
  12. 12.15 × 18 =
  13. 13.125 × 30 =
  14. 14.125 × 30 =
  15. 15.65 × 26 =
  16. 16.45 × 10 =
  17. 17.40 × 25 =
  18. 18.35 × 30 =
  19. 19.34 × 25 =
  20. 20.55 × 6 =
  21. 21.8 × 15 =
  22. 22.125 × 26 =
  23. 23.10 × 15 =
  24. 24.75 × 16 =
  25. 25.15 × 14 =
  26. 26.35 × 12 =
  27. 27.15 × 12 =
  28. 28.35 × 20 =
  29. 29.55 × 30 =
  30. 30.24 × 25 =
  31. 31.8 × 45 =
  32. 32.45 × 34 =
  33. 33.35 × 36 =
  34. 34.18 × 25 =
  35. 35.8 × 15 =
  36. 36.45 × 26 =
  37. 37.125 × 36 =
  38. 38.45 × 34 =
  39. 39.35 × 24 =
  40. 40.45 × 6 =

Answer key

  1. 810
  2. 350
  3. 700
  4. 1260
  5. 750
  6. 900
  7. 850
  8. 450
  9. 210
  10. 910
  11. 210
  12. 270
  13. 3750
  14. 3750
  15. 1690
  16. 450
  17. 1000
  18. 1050
  19. 850
  20. 330
  21. 120
  22. 3250
  23. 150
  24. 1200
  25. 210
  26. 420
  27. 180
  28. 700
  29. 1650
  30. 600
  31. 360
  32. 1530
  33. 1260
  34. 450
  35. 120
  36. 1170
  37. 4500
  38. 1530
  39. 840
  40. 270

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