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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 883 · 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. 1.15 × 8 =
  2. 2.10 × 15 =
  3. 3.25 × 12 =
  4. 4.65 × 6 =
  5. 5.25 × 22 =
  6. 6.14 × 75 =
  7. 7.12 × 65 =
  8. 8.125 × 20 =
  9. 9.12 × 25 =
  10. 10.8 × 65 =
  11. 11.28 × 125 =
  12. 12.24 × 15 =
  13. 13.65 × 12 =
  14. 14.30 × 45 =
  15. 15.14 × 35 =
  16. 16.16 × 35 =
  17. 17.35 × 16 =
  18. 18.55 × 30 =
  19. 19.40 × 45 =
  20. 20.55 × 8 =
  21. 21.40 × 25 =
  22. 22.45 × 10 =
  23. 23.25 × 24 =
  24. 24.45 × 34 =
  25. 25.15 × 8 =
  26. 26.25 × 22 =
  27. 27.65 × 24 =
  28. 28.16 × 15 =
  29. 29.26 × 65 =
  30. 30.10 × 55 =
  31. 31.35 × 36 =
  32. 32.125 × 40 =
  33. 33.125 × 34 =
  34. 34.15 × 14 =
  35. 35.125 × 22 =
  36. 36.25 × 12 =
  37. 37.65 × 8 =
  38. 38.40 × 75 =
  39. 39.25 × 26 =
  40. 40.35 × 12 =

Answer key

  1. 120
  2. 150
  3. 300
  4. 390
  5. 550
  6. 1050
  7. 780
  8. 2500
  9. 300
  10. 520
  11. 3500
  12. 360
  13. 780
  14. 1350
  15. 490
  16. 560
  17. 560
  18. 1650
  19. 1800
  20. 440
  21. 1000
  22. 450
  23. 600
  24. 1530
  25. 120
  26. 550
  27. 1560
  28. 240
  29. 1690
  30. 550
  31. 1260
  32. 5000
  33. 4250
  34. 210
  35. 2750
  36. 300
  37. 520
  38. 3000
  39. 650
  40. 420

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