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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 884 · 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 × 34 =
  2. 2.28 × 15 =
  3. 3.65 × 16 =
  4. 4.22 × 15 =
  5. 5.14 × 45 =
  6. 6.20 × 55 =
  7. 7.15 × 34 =
  8. 8.6 × 55 =
  9. 9.55 × 18 =
  10. 10.26 × 125 =
  11. 11.12 × 55 =
  12. 12.35 × 26 =
  13. 13.25 × 38 =
  14. 14.28 × 45 =
  15. 15.18 × 125 =
  16. 16.10 × 15 =
  17. 17.32 × 75 =
  18. 18.34 × 125 =
  19. 19.14 × 55 =
  20. 20.24 × 125 =
  21. 21.45 × 10 =
  22. 22.35 × 18 =
  23. 23.25 × 10 =
  24. 24.26 × 35 =
  25. 25.15 × 8 =
  26. 26.35 × 18 =
  27. 27.45 × 10 =
  28. 28.35 × 30 =
  29. 29.25 × 18 =
  30. 30.25 × 38 =
  31. 31.125 × 24 =
  32. 32.10 × 25 =
  33. 33.32 × 125 =
  34. 34.34 × 15 =
  35. 35.38 × 25 =
  36. 36.40 × 15 =
  37. 37.65 × 18 =
  38. 38.38 × 75 =
  39. 39.12 × 65 =
  40. 40.25 × 14 =

Answer key

  1. 510
  2. 420
  3. 1040
  4. 330
  5. 630
  6. 1100
  7. 510
  8. 330
  9. 990
  10. 3250
  11. 660
  12. 910
  13. 950
  14. 1260
  15. 2250
  16. 150
  17. 2400
  18. 4250
  19. 770
  20. 3000
  21. 450
  22. 630
  23. 250
  24. 910
  25. 120
  26. 630
  27. 450
  28. 1050
  29. 450
  30. 950
  31. 3000
  32. 250
  33. 4000
  34. 510
  35. 950
  36. 600
  37. 1170
  38. 2850
  39. 780
  40. 350

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