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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 990 · 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 × 45 =
  2. 2.55 × 34 =
  3. 3.14 × 75 =
  4. 4.18 × 125 =
  5. 5.22 × 65 =
  6. 6.12 × 55 =
  7. 7.55 × 16 =
  8. 8.40 × 45 =
  9. 9.55 × 24 =
  10. 10.35 × 36 =
  11. 11.35 × 38 =
  12. 12.6 × 75 =
  13. 13.22 × 75 =
  14. 14.45 × 40 =
  15. 15.35 × 34 =
  16. 16.65 × 10 =
  17. 17.75 × 10 =
  18. 18.55 × 18 =
  19. 19.35 × 20 =
  20. 20.6 × 75 =
  21. 21.75 × 24 =
  22. 22.55 × 18 =
  23. 23.35 × 20 =
  24. 24.22 × 55 =
  25. 25.35 × 8 =
  26. 26.20 × 55 =
  27. 27.45 × 16 =
  28. 28.28 × 25 =
  29. 29.38 × 75 =
  30. 30.15 × 26 =
  31. 31.24 × 25 =
  32. 32.12 × 15 =
  33. 33.125 × 12 =
  34. 34.55 × 12 =
  35. 35.65 × 26 =
  36. 36.35 × 16 =
  37. 37.45 × 20 =
  38. 38.125 × 24 =
  39. 39.25 × 28 =
  40. 40.10 × 55 =

Answer key

  1. 1080
  2. 1870
  3. 1050
  4. 2250
  5. 1430
  6. 660
  7. 880
  8. 1800
  9. 1320
  10. 1260
  11. 1330
  12. 450
  13. 1650
  14. 1800
  15. 1190
  16. 650
  17. 750
  18. 990
  19. 700
  20. 450
  21. 1800
  22. 990
  23. 700
  24. 1210
  25. 280
  26. 1100
  27. 720
  28. 700
  29. 2850
  30. 390
  31. 600
  32. 180
  33. 1500
  34. 660
  35. 1690
  36. 560
  37. 900
  38. 3000
  39. 700
  40. 550

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