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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 249 · 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. 1.10 × 15 =
  2. 2.30 × 55 =
  3. 3.20 × 15 =
  4. 4.75 × 6 =
  5. 5.6 × 75 =
  6. 6.35 × 22 =
  7. 7.22 × 15 =
  8. 8.18 × 55 =
  9. 9.30 × 15 =
  10. 10.36 × 25 =
  11. 11.6 × 15 =
  12. 12.125 × 28 =
  13. 13.25 × 38 =
  14. 14.12 × 65 =
  15. 15.45 × 38 =
  16. 16.15 × 36 =
  17. 17.25 × 24 =
  18. 18.45 × 10 =
  19. 19.28 × 75 =
  20. 20.22 × 75 =
  21. 21.32 × 35 =
  22. 22.35 × 20 =
  23. 23.18 × 65 =
  24. 24.35 × 26 =
  25. 25.35 × 10 =
  26. 26.25 × 18 =
  27. 27.65 × 24 =
  28. 28.35 × 38 =
  29. 29.65 × 22 =
  30. 30.65 × 10 =
  31. 31.125 × 32 =
  32. 32.24 × 15 =
  33. 33.6 × 65 =
  34. 34.26 × 35 =
  35. 35.45 × 8 =
  36. 36.40 × 75 =
  37. 37.125 × 20 =
  38. 38.75 × 26 =
  39. 39.35 × 8 =
  40. 40.35 × 12 =

Answer key

  1. 150
  2. 1650
  3. 300
  4. 450
  5. 450
  6. 770
  7. 330
  8. 990
  9. 450
  10. 900
  11. 90
  12. 3500
  13. 950
  14. 780
  15. 1710
  16. 540
  17. 600
  18. 450
  19. 2100
  20. 1650
  21. 1120
  22. 700
  23. 1170
  24. 910
  25. 350
  26. 450
  27. 1560
  28. 1330
  29. 1430
  30. 650
  31. 4000
  32. 360
  33. 390
  34. 910
  35. 360
  36. 3000
  37. 2500
  38. 1950
  39. 280
  40. 420

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