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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 73 · 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 × 25 =
  2. 2.125 × 38 =
  3. 3.10 × 45 =
  4. 4.20 × 55 =
  5. 5.65 × 26 =
  6. 6.25 × 32 =
  7. 7.55 × 16 =
  8. 8.45 × 12 =
  9. 9.38 × 55 =
  10. 10.45 × 22 =
  11. 11.75 × 22 =
  12. 12.26 × 15 =
  13. 13.75 × 18 =
  14. 14.30 × 15 =
  15. 15.75 × 8 =
  16. 16.45 × 38 =
  17. 17.15 × 34 =
  18. 18.75 × 36 =
  19. 19.26 × 15 =
  20. 20.55 × 36 =
  21. 21.15 × 36 =
  22. 22.12 × 65 =
  23. 23.35 × 10 =
  24. 24.45 × 38 =
  25. 25.15 × 6 =
  26. 26.38 × 125 =
  27. 27.55 × 38 =
  28. 28.125 × 16 =
  29. 29.22 × 15 =
  30. 30.125 × 10 =
  31. 31.36 × 25 =
  32. 32.75 × 20 =
  33. 33.25 × 26 =
  34. 34.6 × 25 =
  35. 35.75 × 20 =
  36. 36.55 × 12 =
  37. 37.25 × 40 =
  38. 38.22 × 35 =
  39. 39.75 × 20 =
  40. 40.35 × 12 =

Answer key

  1. 350
  2. 4750
  3. 450
  4. 1100
  5. 1690
  6. 800
  7. 880
  8. 540
  9. 2090
  10. 990
  11. 1650
  12. 390
  13. 1350
  14. 450
  15. 600
  16. 1710
  17. 510
  18. 2700
  19. 390
  20. 1980
  21. 540
  22. 780
  23. 350
  24. 1710
  25. 90
  26. 4750
  27. 2090
  28. 2000
  29. 330
  30. 1250
  31. 900
  32. 1500
  33. 650
  34. 150
  35. 1500
  36. 660
  37. 1000
  38. 770
  39. 1500
  40. 420

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