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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 315 · 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. 1.36 × 15 =
  2. 2.35 × 38 =
  3. 3.55 × 36 =
  4. 4.15 × 14 =
  5. 5.35 × 12 =
  6. 6.34 × 25 =
  7. 7.36 × 35 =
  8. 8.25 × 20 =
  9. 9.25 × 34 =
  10. 10.45 × 30 =
  11. 11.35 × 16 =
  12. 12.18 × 45 =
  13. 13.65 × 18 =
  14. 14.45 × 26 =
  15. 15.24 × 25 =
  16. 16.55 × 10 =
  17. 17.36 × 25 =
  18. 18.125 × 40 =
  19. 19.65 × 14 =
  20. 20.75 × 20 =
  21. 21.28 × 15 =
  22. 22.32 × 65 =
  23. 23.55 × 6 =
  24. 24.65 × 8 =
  25. 25.32 × 45 =
  26. 26.22 × 45 =
  27. 27.75 × 38 =
  28. 28.15 × 30 =
  29. 29.10 × 55 =
  30. 30.75 × 24 =
  31. 31.15 × 24 =
  32. 32.125 × 20 =
  33. 33.6 × 15 =
  34. 34.35 × 20 =
  35. 35.10 × 65 =
  36. 36.18 × 15 =
  37. 37.75 × 24 =
  38. 38.25 × 10 =
  39. 39.125 × 12 =
  40. 40.75 × 34 =

Answer key

  1. 540
  2. 1330
  3. 1980
  4. 210
  5. 420
  6. 850
  7. 1260
  8. 500
  9. 850
  10. 1350
  11. 560
  12. 810
  13. 1170
  14. 1170
  15. 600
  16. 550
  17. 900
  18. 5000
  19. 910
  20. 1500
  21. 420
  22. 2080
  23. 330
  24. 520
  25. 1440
  26. 990
  27. 2850
  28. 450
  29. 550
  30. 1800
  31. 360
  32. 2500
  33. 90
  34. 700
  35. 650
  36. 270
  37. 1800
  38. 250
  39. 1500
  40. 2550

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