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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 923 · 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. 1.75 × 24 =
  2. 2.18 × 55 =
  3. 3.55 × 6 =
  4. 4.45 × 28 =
  5. 5.16 × 15 =
  6. 6.125 × 20 =
  7. 7.35 × 40 =
  8. 8.65 × 6 =
  9. 9.40 × 65 =
  10. 10.40 × 15 =
  11. 11.65 × 12 =
  12. 12.65 × 12 =
  13. 13.36 × 75 =
  14. 14.125 × 40 =
  15. 15.35 × 32 =
  16. 16.18 × 15 =
  17. 17.22 × 35 =
  18. 18.12 × 15 =
  19. 19.125 × 28 =
  20. 20.8 × 25 =
  21. 21.22 × 45 =
  22. 22.36 × 45 =
  23. 23.15 × 34 =
  24. 24.125 × 36 =
  25. 25.40 × 75 =
  26. 26.125 × 22 =
  27. 27.36 × 65 =
  28. 28.65 × 34 =
  29. 29.14 × 35 =
  30. 30.25 × 38 =
  31. 31.16 × 55 =
  32. 32.125 × 22 =
  33. 33.30 × 15 =
  34. 34.65 × 22 =
  35. 35.24 × 75 =
  36. 36.36 × 35 =
  37. 37.26 × 45 =
  38. 38.32 × 45 =
  39. 39.32 × 45 =
  40. 40.10 × 25 =

Answer key

  1. 1800
  2. 990
  3. 330
  4. 1260
  5. 240
  6. 2500
  7. 1400
  8. 390
  9. 2600
  10. 600
  11. 780
  12. 780
  13. 2700
  14. 5000
  15. 1120
  16. 270
  17. 770
  18. 180
  19. 3500
  20. 200
  21. 990
  22. 1620
  23. 510
  24. 4500
  25. 3000
  26. 2750
  27. 2340
  28. 2210
  29. 490
  30. 950
  31. 880
  32. 2750
  33. 450
  34. 1430
  35. 1800
  36. 1260
  37. 1170
  38. 1440
  39. 1440
  40. 250

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