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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 906 · 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. 1.28 × 15 =
  2. 2.125 × 12 =
  3. 3.14 × 15 =
  4. 4.10 × 25 =
  5. 5.65 × 34 =
  6. 6.55 × 18 =
  7. 7.75 × 28 =
  8. 8.45 × 10 =
  9. 9.45 × 8 =
  10. 10.16 × 25 =
  11. 11.14 × 55 =
  12. 12.45 × 24 =
  13. 13.10 × 65 =
  14. 14.125 × 28 =
  15. 15.25 × 12 =
  16. 16.55 × 30 =
  17. 17.20 × 125 =
  18. 18.24 × 25 =
  19. 19.15 × 6 =
  20. 20.6 × 35 =
  21. 21.75 × 26 =
  22. 22.45 × 34 =
  23. 23.10 × 35 =
  24. 24.45 × 32 =
  25. 25.75 × 6 =
  26. 26.25 × 30 =
  27. 27.35 × 24 =
  28. 28.30 × 125 =
  29. 29.75 × 18 =
  30. 30.45 × 18 =
  31. 31.10 × 65 =
  32. 32.125 × 28 =
  33. 33.20 × 35 =
  34. 34.25 × 28 =
  35. 35.28 × 125 =
  36. 36.55 × 6 =
  37. 37.30 × 45 =
  38. 38.35 × 16 =
  39. 39.8 × 75 =
  40. 40.8 × 35 =

Answer key

  1. 420
  2. 1500
  3. 210
  4. 250
  5. 2210
  6. 990
  7. 2100
  8. 450
  9. 360
  10. 400
  11. 770
  12. 1080
  13. 650
  14. 3500
  15. 300
  16. 1650
  17. 2500
  18. 600
  19. 90
  20. 210
  21. 1950
  22. 1530
  23. 350
  24. 1440
  25. 450
  26. 750
  27. 840
  28. 3750
  29. 1350
  30. 810
  31. 650
  32. 3500
  33. 700
  34. 700
  35. 3500
  36. 330
  37. 1350
  38. 560
  39. 600
  40. 280

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