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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 29 · 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. 1.35 × 12 =
  2. 2.6 × 75 =
  3. 3.38 × 35 =
  4. 4.35 × 12 =
  5. 5.125 × 6 =
  6. 6.10 × 35 =
  7. 7.65 × 24 =
  8. 8.26 × 25 =
  9. 9.30 × 125 =
  10. 10.75 × 24 =
  11. 11.8 × 25 =
  12. 12.45 × 22 =
  13. 13.15 × 16 =
  14. 14.15 × 18 =
  15. 15.12 × 45 =
  16. 16.125 × 40 =
  17. 17.22 × 35 =
  18. 18.125 × 26 =
  19. 19.55 × 20 =
  20. 20.38 × 55 =
  21. 21.15 × 8 =
  22. 22.6 × 15 =
  23. 23.12 × 25 =
  24. 24.35 × 28 =
  25. 25.18 × 65 =
  26. 26.6 × 25 =
  27. 27.65 × 28 =
  28. 28.25 × 28 =
  29. 29.32 × 25 =
  30. 30.6 × 65 =
  31. 31.34 × 45 =
  32. 32.65 × 22 =
  33. 33.125 × 40 =
  34. 34.6 × 15 =
  35. 35.25 × 32 =
  36. 36.15 × 30 =
  37. 37.15 × 6 =
  38. 38.35 × 8 =
  39. 39.18 × 55 =
  40. 40.25 × 22 =

Answer key

  1. 420
  2. 450
  3. 1330
  4. 420
  5. 750
  6. 350
  7. 1560
  8. 650
  9. 3750
  10. 1800
  11. 200
  12. 990
  13. 240
  14. 270
  15. 540
  16. 5000
  17. 770
  18. 3250
  19. 1100
  20. 2090
  21. 120
  22. 90
  23. 300
  24. 980
  25. 1170
  26. 150
  27. 1820
  28. 700
  29. 800
  30. 390
  31. 1530
  32. 1430
  33. 5000
  34. 90
  35. 800
  36. 450
  37. 90
  38. 280
  39. 990
  40. 550

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