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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 608 · 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. 1.26 × 55 =
  2. 2.125 × 24 =
  3. 3.35 × 16 =
  4. 4.40 × 25 =
  5. 5.6 × 45 =
  6. 6.45 × 40 =
  7. 7.125 × 8 =
  8. 8.45 × 34 =
  9. 9.75 × 26 =
  10. 10.6 × 15 =
  11. 11.38 × 25 =
  12. 12.45 × 36 =
  13. 13.25 × 40 =
  14. 14.14 × 25 =
  15. 15.35 × 12 =
  16. 16.12 × 15 =
  17. 17.35 × 32 =
  18. 18.125 × 30 =
  19. 19.125 × 18 =
  20. 20.20 × 15 =
  21. 21.12 × 75 =
  22. 22.28 × 25 =
  23. 23.35 × 24 =
  24. 24.30 × 25 =
  25. 25.34 × 125 =
  26. 26.15 × 38 =
  27. 27.125 × 8 =
  28. 28.8 × 15 =
  29. 29.24 × 45 =
  30. 30.75 × 6 =
  31. 31.65 × 22 =
  32. 32.35 × 28 =
  33. 33.65 × 6 =
  34. 34.55 × 36 =
  35. 35.22 × 65 =
  36. 36.8 × 75 =
  37. 37.55 × 20 =
  38. 38.35 × 10 =
  39. 39.125 × 28 =
  40. 40.30 × 65 =

Answer key

  1. 1430
  2. 3000
  3. 560
  4. 1000
  5. 270
  6. 1800
  7. 1000
  8. 1530
  9. 1950
  10. 90
  11. 950
  12. 1620
  13. 1000
  14. 350
  15. 420
  16. 180
  17. 1120
  18. 3750
  19. 2250
  20. 300
  21. 900
  22. 700
  23. 840
  24. 750
  25. 4250
  26. 570
  27. 1000
  28. 120
  29. 1080
  30. 450
  31. 1430
  32. 980
  33. 390
  34. 1980
  35. 1430
  36. 600
  37. 1100
  38. 350
  39. 3500
  40. 1950

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