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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 934 · 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. 1.6 × 15 =
  2. 2.75 × 24 =
  3. 3.18 × 55 =
  4. 4.40 × 35 =
  5. 5.25 × 24 =
  6. 6.6 × 15 =
  7. 7.35 × 12 =
  8. 8.75 × 20 =
  9. 9.30 × 15 =
  10. 10.10 × 55 =
  11. 11.25 × 12 =
  12. 12.65 × 28 =
  13. 13.16 × 35 =
  14. 14.25 × 14 =
  15. 15.14 × 125 =
  16. 16.14 × 75 =
  17. 17.12 × 45 =
  18. 18.12 × 25 =
  19. 19.15 × 30 =
  20. 20.24 × 35 =
  21. 21.45 × 40 =
  22. 22.22 × 45 =
  23. 23.15 × 20 =
  24. 24.6 × 15 =
  25. 25.65 × 8 =
  26. 26.25 × 14 =
  27. 27.12 × 45 =
  28. 28.16 × 65 =
  29. 29.24 × 35 =
  30. 30.35 × 14 =
  31. 31.35 × 14 =
  32. 32.14 × 15 =
  33. 33.45 × 34 =
  34. 34.65 × 30 =
  35. 35.12 × 15 =
  36. 36.22 × 75 =
  37. 37.32 × 25 =
  38. 38.55 × 26 =
  39. 39.75 × 6 =
  40. 40.65 × 8 =

Answer key

  1. 90
  2. 1800
  3. 990
  4. 1400
  5. 600
  6. 90
  7. 420
  8. 1500
  9. 450
  10. 550
  11. 300
  12. 1820
  13. 560
  14. 350
  15. 1750
  16. 1050
  17. 540
  18. 300
  19. 450
  20. 840
  21. 1800
  22. 990
  23. 300
  24. 90
  25. 520
  26. 350
  27. 540
  28. 1040
  29. 840
  30. 490
  31. 490
  32. 210
  33. 1530
  34. 1950
  35. 180
  36. 1650
  37. 800
  38. 1430
  39. 450
  40. 520

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