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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 143 · 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. 1.22 × 45 =
  2. 2.24 × 65 =
  3. 3.38 × 25 =
  4. 4.20 × 75 =
  5. 5.125 × 32 =
  6. 6.15 × 14 =
  7. 7.25 × 40 =
  8. 8.6 × 15 =
  9. 9.75 × 28 =
  10. 10.75 × 10 =
  11. 11.38 × 65 =
  12. 12.32 × 35 =
  13. 13.16 × 75 =
  14. 14.65 × 18 =
  15. 15.22 × 65 =
  16. 16.55 × 22 =
  17. 17.36 × 35 =
  18. 18.36 × 15 =
  19. 19.28 × 35 =
  20. 20.75 × 36 =
  21. 21.75 × 28 =
  22. 22.25 × 20 =
  23. 23.18 × 55 =
  24. 24.20 × 15 =
  25. 25.125 × 16 =
  26. 26.14 × 35 =
  27. 27.6 × 55 =
  28. 28.15 × 26 =
  29. 29.18 × 65 =
  30. 30.15 × 40 =
  31. 31.125 × 30 =
  32. 32.55 × 32 =
  33. 33.25 × 26 =
  34. 34.18 × 35 =
  35. 35.65 × 20 =
  36. 36.12 × 65 =
  37. 37.125 × 18 =
  38. 38.12 × 25 =
  39. 39.20 × 45 =
  40. 40.10 × 15 =

Answer key

  1. 990
  2. 1560
  3. 950
  4. 1500
  5. 4000
  6. 210
  7. 1000
  8. 90
  9. 2100
  10. 750
  11. 2470
  12. 1120
  13. 1200
  14. 1170
  15. 1430
  16. 1210
  17. 1260
  18. 540
  19. 980
  20. 2700
  21. 2100
  22. 500
  23. 990
  24. 300
  25. 2000
  26. 490
  27. 330
  28. 390
  29. 1170
  30. 600
  31. 3750
  32. 1760
  33. 650
  34. 630
  35. 1300
  36. 780
  37. 2250
  38. 300
  39. 900
  40. 150

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