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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 960 · 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. 1.32 × 25 =
  2. 2.15 × 26 =
  3. 3.45 × 34 =
  4. 4.15 × 12 =
  5. 5.30 × 35 =
  6. 6.36 × 35 =
  7. 7.125 × 24 =
  8. 8.25 × 34 =
  9. 9.75 × 24 =
  10. 10.18 × 125 =
  11. 11.45 × 14 =
  12. 12.6 × 35 =
  13. 13.55 × 40 =
  14. 14.22 × 15 =
  15. 15.15 × 6 =
  16. 16.45 × 6 =
  17. 17.22 × 25 =
  18. 18.125 × 10 =
  19. 19.25 × 34 =
  20. 20.55 × 12 =
  21. 21.36 × 65 =
  22. 22.65 × 22 =
  23. 23.15 × 18 =
  24. 24.45 × 30 =
  25. 25.35 × 28 =
  26. 26.16 × 35 =
  27. 27.38 × 15 =
  28. 28.55 × 16 =
  29. 29.75 × 18 =
  30. 30.45 × 26 =
  31. 31.55 × 20 =
  32. 32.35 × 36 =
  33. 33.28 × 55 =
  34. 34.35 × 16 =
  35. 35.8 × 35 =
  36. 36.75 × 24 =
  37. 37.24 × 45 =
  38. 38.25 × 38 =
  39. 39.75 × 38 =
  40. 40.30 × 125 =

Answer key

  1. 800
  2. 390
  3. 1530
  4. 180
  5. 1050
  6. 1260
  7. 3000
  8. 850
  9. 1800
  10. 2250
  11. 630
  12. 210
  13. 2200
  14. 330
  15. 90
  16. 270
  17. 550
  18. 1250
  19. 850
  20. 660
  21. 2340
  22. 1430
  23. 270
  24. 1350
  25. 980
  26. 560
  27. 570
  28. 880
  29. 1350
  30. 1170
  31. 1100
  32. 1260
  33. 1540
  34. 560
  35. 280
  36. 1800
  37. 1080
  38. 950
  39. 2850
  40. 3750

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