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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 632 · 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. 1.24 × 65 =
  2. 2.65 × 36 =
  3. 3.55 × 14 =
  4. 4.35 × 34 =
  5. 5.65 × 8 =
  6. 6.25 × 36 =
  7. 7.15 × 26 =
  8. 8.125 × 10 =
  9. 9.38 × 75 =
  10. 10.35 × 16 =
  11. 11.32 × 35 =
  12. 12.34 × 125 =
  13. 13.35 × 28 =
  14. 14.45 × 32 =
  15. 15.25 × 10 =
  16. 16.36 × 15 =
  17. 17.6 × 45 =
  18. 18.34 × 45 =
  19. 19.6 × 15 =
  20. 20.24 × 45 =
  21. 21.65 × 28 =
  22. 22.24 × 75 =
  23. 23.35 × 16 =
  24. 24.25 × 14 =
  25. 25.18 × 35 =
  26. 26.12 × 25 =
  27. 27.55 × 40 =
  28. 28.30 × 75 =
  29. 29.75 × 30 =
  30. 30.16 × 75 =
  31. 31.22 × 125 =
  32. 32.35 × 8 =
  33. 33.65 × 6 =
  34. 34.75 × 22 =
  35. 35.12 × 15 =
  36. 36.55 × 8 =
  37. 37.38 × 125 =
  38. 38.28 × 75 =
  39. 39.75 × 20 =
  40. 40.65 × 6 =

Answer key

  1. 1560
  2. 2340
  3. 770
  4. 1190
  5. 520
  6. 900
  7. 390
  8. 1250
  9. 2850
  10. 560
  11. 1120
  12. 4250
  13. 980
  14. 1440
  15. 250
  16. 540
  17. 270
  18. 1530
  19. 90
  20. 1080
  21. 1820
  22. 1800
  23. 560
  24. 350
  25. 630
  26. 300
  27. 2200
  28. 2250
  29. 2250
  30. 1200
  31. 2750
  32. 280
  33. 390
  34. 1650
  35. 180
  36. 440
  37. 4750
  38. 2100
  39. 1500
  40. 390

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