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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 826 · 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. 1.14 × 35 =
  2. 2.8 × 35 =
  3. 3.14 × 35 =
  4. 4.8 × 35 =
  5. 5.6 × 75 =
  6. 6.8 × 65 =
  7. 7.28 × 75 =
  8. 8.35 × 34 =
  9. 9.35 × 22 =
  10. 10.28 × 75 =
  11. 11.8 × 75 =
  12. 12.35 × 6 =
  13. 13.15 × 36 =
  14. 14.15 × 8 =
  15. 15.38 × 75 =
  16. 16.36 × 15 =
  17. 17.45 × 8 =
  18. 18.15 × 18 =
  19. 19.55 × 34 =
  20. 20.25 × 12 =
  21. 21.10 × 15 =
  22. 22.125 × 8 =
  23. 23.16 × 15 =
  24. 24.65 × 16 =
  25. 25.34 × 35 =
  26. 26.20 × 55 =
  27. 27.35 × 16 =
  28. 28.16 × 75 =
  29. 29.12 × 75 =
  30. 30.125 × 6 =
  31. 31.25 × 10 =
  32. 32.40 × 65 =
  33. 33.32 × 55 =
  34. 34.75 × 22 =
  35. 35.35 × 16 =
  36. 36.30 × 45 =
  37. 37.34 × 45 =
  38. 38.24 × 125 =
  39. 39.55 × 16 =
  40. 40.10 × 15 =

Answer key

  1. 490
  2. 280
  3. 490
  4. 280
  5. 450
  6. 520
  7. 2100
  8. 1190
  9. 770
  10. 2100
  11. 600
  12. 210
  13. 540
  14. 120
  15. 2850
  16. 540
  17. 360
  18. 270
  19. 1870
  20. 300
  21. 150
  22. 1000
  23. 240
  24. 1040
  25. 1190
  26. 1100
  27. 560
  28. 1200
  29. 900
  30. 750
  31. 250
  32. 2600
  33. 1760
  34. 1650
  35. 560
  36. 1350
  37. 1530
  38. 3000
  39. 880
  40. 150

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