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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 740 · 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. 1.125 × 12 =
  2. 2.18 × 25 =
  3. 3.15 × 34 =
  4. 4.6 × 55 =
  5. 5.26 × 125 =
  6. 6.20 × 45 =
  7. 7.65 × 36 =
  8. 8.14 × 75 =
  9. 9.40 × 25 =
  10. 10.25 × 32 =
  11. 11.55 × 8 =
  12. 12.45 × 24 =
  13. 13.15 × 8 =
  14. 14.18 × 55 =
  15. 15.75 × 30 =
  16. 16.35 × 28 =
  17. 17.45 × 6 =
  18. 18.22 × 25 =
  19. 19.65 × 10 =
  20. 20.125 × 8 =
  21. 21.65 × 26 =
  22. 22.55 × 6 =
  23. 23.125 × 28 =
  24. 24.26 × 25 =
  25. 25.14 × 125 =
  26. 26.10 × 15 =
  27. 27.10 × 65 =
  28. 28.75 × 30 =
  29. 29.55 × 6 =
  30. 30.75 × 18 =
  31. 31.6 × 55 =
  32. 32.125 × 26 =
  33. 33.28 × 125 =
  34. 34.125 × 10 =
  35. 35.34 × 125 =
  36. 36.6 × 45 =
  37. 37.125 × 12 =
  38. 38.125 × 34 =
  39. 39.65 × 32 =
  40. 40.15 × 36 =

Answer key

  1. 1500
  2. 450
  3. 510
  4. 330
  5. 3250
  6. 900
  7. 2340
  8. 1050
  9. 1000
  10. 800
  11. 440
  12. 1080
  13. 120
  14. 990
  15. 2250
  16. 980
  17. 270
  18. 550
  19. 650
  20. 1000
  21. 1690
  22. 330
  23. 3500
  24. 650
  25. 1750
  26. 150
  27. 650
  28. 2250
  29. 330
  30. 1350
  31. 330
  32. 3250
  33. 3500
  34. 1250
  35. 4250
  36. 270
  37. 1500
  38. 4250
  39. 2080
  40. 540

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