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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 271 · 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. 2.28 × 125 =
  3. 3.35 × 6 =
  4. 4.15 × 36 =
  5. 5.55 × 20 =
  6. 6.125 × 24 =
  7. 7.45 × 40 =
  8. 8.12 × 55 =
  9. 9.35 × 22 =
  10. 10.22 × 45 =
  11. 11.75 × 34 =
  12. 12.28 × 25 =
  13. 13.65 × 8 =
  14. 14.75 × 18 =
  15. 15.24 × 75 =
  16. 16.35 × 34 =
  17. 17.32 × 45 =
  18. 18.38 × 125 =
  19. 19.125 × 40 =
  20. 20.75 × 38 =
  21. 21.125 × 40 =
  22. 22.30 × 55 =
  23. 23.35 × 22 =
  24. 24.55 × 8 =
  25. 25.15 × 8 =
  26. 26.125 × 26 =
  27. 27.55 × 16 =
  28. 28.125 × 32 =
  29. 29.30 × 75 =
  30. 30.16 × 55 =
  31. 31.26 × 15 =
  32. 32.40 × 25 =
  33. 33.22 × 45 =
  34. 34.20 × 15 =
  35. 35.65 × 16 =
  36. 36.15 × 20 =
  37. 37.25 × 26 =
  38. 38.45 × 34 =
  39. 39.8 × 75 =
  40. 40.25 × 40 =

Answer key

  1. 1800
  2. 3500
  3. 210
  4. 540
  5. 1100
  6. 3000
  7. 1800
  8. 660
  9. 770
  10. 990
  11. 2550
  12. 700
  13. 520
  14. 1350
  15. 1800
  16. 1190
  17. 1440
  18. 4750
  19. 5000
  20. 2850
  21. 5000
  22. 1650
  23. 770
  24. 440
  25. 120
  26. 3250
  27. 880
  28. 4000
  29. 2250
  30. 880
  31. 390
  32. 1000
  33. 990
  34. 300
  35. 1040
  36. 300
  37. 650
  38. 1530
  39. 600
  40. 1000

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