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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 630 · 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 × 34 =
  2. 2.65 × 28 =
  3. 3.6 × 75 =
  4. 4.10 × 35 =
  5. 5.55 × 34 =
  6. 6.125 × 32 =
  7. 7.15 × 30 =
  8. 8.25 × 40 =
  9. 9.65 × 6 =
  10. 10.75 × 28 =
  11. 11.10 × 55 =
  12. 12.36 × 55 =
  13. 13.24 × 15 =
  14. 14.45 × 30 =
  15. 15.15 × 6 =
  16. 16.75 × 18 =
  17. 17.65 × 40 =
  18. 18.45 × 18 =
  19. 19.25 × 30 =
  20. 20.35 × 10 =
  21. 21.28 × 35 =
  22. 22.25 × 26 =
  23. 23.32 × 45 =
  24. 24.10 × 75 =
  25. 25.125 × 18 =
  26. 26.15 × 34 =
  27. 27.22 × 45 =
  28. 28.16 × 55 =
  29. 29.25 × 36 =
  30. 30.55 × 6 =
  31. 31.55 × 28 =
  32. 32.14 × 25 =
  33. 33.45 × 14 =
  34. 34.75 × 8 =
  35. 35.125 × 26 =
  36. 36.45 × 8 =
  37. 37.125 × 32 =
  38. 38.125 × 18 =
  39. 39.25 × 16 =
  40. 40.24 × 75 =

Answer key

  1. 850
  2. 1820
  3. 450
  4. 350
  5. 1870
  6. 4000
  7. 450
  8. 1000
  9. 390
  10. 2100
  11. 550
  12. 1980
  13. 360
  14. 1350
  15. 90
  16. 1350
  17. 2600
  18. 810
  19. 750
  20. 350
  21. 980
  22. 650
  23. 1440
  24. 750
  25. 2250
  26. 510
  27. 990
  28. 880
  29. 900
  30. 330
  31. 1540
  32. 350
  33. 630
  34. 600
  35. 3250
  36. 360
  37. 4000
  38. 2250
  39. 400
  40. 1800

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