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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 861 · 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. 1.24 × 125 =
  2. 2.45 × 24 =
  3. 3.35 × 6 =
  4. 4.125 × 20 =
  5. 5.15 × 10 =
  6. 6.45 × 26 =
  7. 7.55 × 38 =
  8. 8.55 × 26 =
  9. 9.38 × 15 =
  10. 10.125 × 30 =
  11. 11.8 × 35 =
  12. 12.18 × 55 =
  13. 13.30 × 35 =
  14. 14.125 × 10 =
  15. 15.75 × 18 =
  16. 16.34 × 65 =
  17. 17.65 × 6 =
  18. 18.55 × 8 =
  19. 19.24 × 65 =
  20. 20.65 × 10 =
  21. 21.75 × 26 =
  22. 22.14 × 45 =
  23. 23.28 × 15 =
  24. 24.35 × 14 =
  25. 25.10 × 75 =
  26. 26.125 × 24 =
  27. 27.38 × 75 =
  28. 28.55 × 12 =
  29. 29.25 × 16 =
  30. 30.32 × 25 =
  31. 31.75 × 16 =
  32. 32.125 × 16 =
  33. 33.125 × 8 =
  34. 34.125 × 20 =
  35. 35.26 × 15 =
  36. 36.24 × 65 =
  37. 37.25 × 18 =
  38. 38.15 × 16 =
  39. 39.75 × 20 =
  40. 40.28 × 45 =

Answer key

  1. 3000
  2. 1080
  3. 210
  4. 2500
  5. 150
  6. 1170
  7. 2090
  8. 1430
  9. 570
  10. 3750
  11. 280
  12. 990
  13. 1050
  14. 1250
  15. 1350
  16. 2210
  17. 390
  18. 440
  19. 1560
  20. 650
  21. 1950
  22. 630
  23. 420
  24. 490
  25. 750
  26. 3000
  27. 2850
  28. 660
  29. 400
  30. 800
  31. 1200
  32. 2000
  33. 1000
  34. 2500
  35. 390
  36. 1560
  37. 450
  38. 240
  39. 1500
  40. 1260

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