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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 612 · 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. 1.38 × 15 =
  2. 2.12 × 55 =
  3. 3.24 × 35 =
  4. 4.15 × 24 =
  5. 5.55 × 40 =
  6. 6.55 × 22 =
  7. 7.45 × 16 =
  8. 8.16 × 35 =
  9. 9.45 × 36 =
  10. 10.6 × 125 =
  11. 11.22 × 75 =
  12. 12.15 × 22 =
  13. 13.40 × 55 =
  14. 14.35 × 18 =
  15. 15.25 × 6 =
  16. 16.65 × 34 =
  17. 17.26 × 75 =
  18. 18.12 × 15 =
  19. 19.25 × 12 =
  20. 20.25 × 8 =
  21. 21.36 × 15 =
  22. 22.20 × 15 =
  23. 23.28 × 125 =
  24. 24.6 × 15 =
  25. 25.45 × 26 =
  26. 26.55 × 12 =
  27. 27.16 × 35 =
  28. 28.35 × 12 =
  29. 29.22 × 125 =
  30. 30.8 × 45 =
  31. 31.12 × 45 =
  32. 32.30 × 55 =
  33. 33.22 × 75 =
  34. 34.35 × 24 =
  35. 35.65 × 20 =
  36. 36.25 × 36 =
  37. 37.65 × 24 =
  38. 38.35 × 34 =
  39. 39.125 × 6 =
  40. 40.75 × 16 =

Answer key

  1. 570
  2. 660
  3. 840
  4. 360
  5. 2200
  6. 1210
  7. 720
  8. 560
  9. 1620
  10. 750
  11. 1650
  12. 330
  13. 2200
  14. 630
  15. 150
  16. 2210
  17. 1950
  18. 180
  19. 300
  20. 200
  21. 540
  22. 300
  23. 3500
  24. 90
  25. 1170
  26. 660
  27. 560
  28. 420
  29. 2750
  30. 360
  31. 540
  32. 1650
  33. 1650
  34. 840
  35. 1300
  36. 900
  37. 1560
  38. 1190
  39. 750
  40. 1200

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