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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 958 · 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. 1.6 × 45 =
  2. 2.75 × 14 =
  3. 3.125 × 40 =
  4. 4.16 × 65 =
  5. 5.55 × 18 =
  6. 6.45 × 24 =
  7. 7.10 × 35 =
  8. 8.18 × 25 =
  9. 9.25 × 6 =
  10. 10.65 × 12 =
  11. 11.34 × 125 =
  12. 12.15 × 30 =
  13. 13.15 × 10 =
  14. 14.75 × 16 =
  15. 15.125 × 10 =
  16. 16.10 × 15 =
  17. 17.45 × 30 =
  18. 18.40 × 45 =
  19. 19.15 × 22 =
  20. 20.24 × 25 =
  21. 21.15 × 16 =
  22. 22.45 × 18 =
  23. 23.20 × 35 =
  24. 24.55 × 40 =
  25. 25.25 × 32 =
  26. 26.22 × 75 =
  27. 27.32 × 25 =
  28. 28.25 × 26 =
  29. 29.65 × 34 =
  30. 30.8 × 55 =
  31. 31.8 × 125 =
  32. 32.65 × 28 =
  33. 33.45 × 22 =
  34. 34.15 × 26 =
  35. 35.45 × 14 =
  36. 36.15 × 8 =
  37. 37.18 × 65 =
  38. 38.24 × 15 =
  39. 39.125 × 36 =
  40. 40.55 × 38 =

Answer key

  1. 270
  2. 1050
  3. 5000
  4. 1040
  5. 990
  6. 1080
  7. 350
  8. 450
  9. 150
  10. 780
  11. 4250
  12. 450
  13. 150
  14. 1200
  15. 1250
  16. 150
  17. 1350
  18. 1800
  19. 330
  20. 600
  21. 240
  22. 810
  23. 700
  24. 2200
  25. 800
  26. 1650
  27. 800
  28. 650
  29. 2210
  30. 440
  31. 1000
  32. 1820
  33. 990
  34. 390
  35. 630
  36. 120
  37. 1170
  38. 360
  39. 4500
  40. 2090

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