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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 223 · 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. 1.65 × 28 =
  2. 2.55 × 26 =
  3. 3.34 × 45 =
  4. 4.55 × 24 =
  5. 5.125 × 8 =
  6. 6.35 × 24 =
  7. 7.34 × 35 =
  8. 8.20 × 65 =
  9. 9.34 × 75 =
  10. 10.12 × 45 =
  11. 11.35 × 34 =
  12. 12.45 × 26 =
  13. 13.28 × 125 =
  14. 14.26 × 125 =
  15. 15.75 × 14 =
  16. 16.16 × 35 =
  17. 17.22 × 25 =
  18. 18.28 × 45 =
  19. 19.15 × 26 =
  20. 20.8 × 15 =
  21. 21.35 × 26 =
  22. 22.8 × 25 =
  23. 23.6 × 15 =
  24. 24.40 × 55 =
  25. 25.28 × 35 =
  26. 26.75 × 20 =
  27. 27.38 × 55 =
  28. 28.34 × 35 =
  29. 29.40 × 125 =
  30. 30.35 × 22 =
  31. 31.15 × 40 =
  32. 32.20 × 55 =
  33. 33.28 × 45 =
  34. 34.18 × 65 =
  35. 35.20 × 45 =
  36. 36.34 × 125 =
  37. 37.25 × 24 =
  38. 38.6 × 45 =
  39. 39.35 × 10 =
  40. 40.75 × 16 =

Answer key

  1. 1820
  2. 1430
  3. 1530
  4. 1320
  5. 1000
  6. 840
  7. 1190
  8. 1300
  9. 2550
  10. 540
  11. 1190
  12. 1170
  13. 3500
  14. 3250
  15. 1050
  16. 560
  17. 550
  18. 1260
  19. 390
  20. 120
  21. 910
  22. 200
  23. 90
  24. 2200
  25. 980
  26. 1500
  27. 2090
  28. 1190
  29. 5000
  30. 770
  31. 600
  32. 1100
  33. 1260
  34. 1170
  35. 900
  36. 4250
  37. 600
  38. 270
  39. 350
  40. 1200

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