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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 410 · 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. 1.25 × 40 =
  2. 2.65 × 28 =
  3. 3.55 × 18 =
  4. 4.45 × 14 =
  5. 5.35 × 16 =
  6. 6.55 × 28 =
  7. 7.28 × 25 =
  8. 8.125 × 34 =
  9. 9.32 × 75 =
  10. 10.6 × 65 =
  11. 11.14 × 55 =
  12. 12.30 × 25 =
  13. 13.34 × 65 =
  14. 14.20 × 35 =
  15. 15.35 × 14 =
  16. 16.75 × 16 =
  17. 17.22 × 45 =
  18. 18.14 × 55 =
  19. 19.26 × 15 =
  20. 20.16 × 15 =
  21. 21.30 × 75 =
  22. 22.12 × 45 =
  23. 23.35 × 12 =
  24. 24.40 × 45 =
  25. 25.15 × 14 =
  26. 26.8 × 125 =
  27. 27.65 × 6 =
  28. 28.55 × 38 =
  29. 29.75 × 26 =
  30. 30.10 × 65 =
  31. 31.45 × 14 =
  32. 32.38 × 45 =
  33. 33.125 × 20 =
  34. 34.24 × 15 =
  35. 35.14 × 15 =
  36. 36.6 × 15 =
  37. 37.8 × 45 =
  38. 38.15 × 26 =
  39. 39.75 × 32 =
  40. 40.65 × 8 =

Answer key

  1. 1000
  2. 1820
  3. 990
  4. 630
  5. 560
  6. 1540
  7. 700
  8. 4250
  9. 2400
  10. 390
  11. 770
  12. 750
  13. 2210
  14. 700
  15. 490
  16. 1200
  17. 990
  18. 770
  19. 390
  20. 240
  21. 2250
  22. 540
  23. 420
  24. 1800
  25. 210
  26. 1000
  27. 390
  28. 2090
  29. 1950
  30. 650
  31. 630
  32. 1710
  33. 2500
  34. 360
  35. 210
  36. 90
  37. 360
  38. 390
  39. 2400
  40. 520

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