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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 285 · 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. 1.125 × 38 =
  2. 2.24 × 125 =
  3. 3.75 × 8 =
  4. 4.34 × 55 =
  5. 5.6 × 15 =
  6. 6.125 × 16 =
  7. 7.35 × 8 =
  8. 8.8 × 25 =
  9. 9.15 × 22 =
  10. 10.40 × 55 =
  11. 11.8 × 65 =
  12. 12.15 × 10 =
  13. 13.12 × 75 =
  14. 14.15 × 22 =
  15. 15.22 × 75 =
  16. 16.35 × 32 =
  17. 17.10 × 15 =
  18. 18.25 × 32 =
  19. 19.65 × 20 =
  20. 20.45 × 10 =
  21. 21.38 × 15 =
  22. 22.8 × 35 =
  23. 23.55 × 26 =
  24. 24.35 × 20 =
  25. 25.30 × 25 =
  26. 26.75 × 8 =
  27. 27.75 × 26 =
  28. 28.28 × 15 =
  29. 29.75 × 12 =
  30. 30.32 × 45 =
  31. 31.8 × 125 =
  32. 32.25 × 12 =
  33. 33.40 × 35 =
  34. 34.26 × 35 =
  35. 35.18 × 55 =
  36. 36.55 × 8 =
  37. 37.14 × 55 =
  38. 38.12 × 75 =
  39. 39.45 × 28 =
  40. 40.8 × 45 =

Answer key

  1. 4750
  2. 3000
  3. 600
  4. 1870
  5. 90
  6. 2000
  7. 280
  8. 200
  9. 330
  10. 2200
  11. 520
  12. 150
  13. 900
  14. 330
  15. 1650
  16. 1120
  17. 150
  18. 800
  19. 1300
  20. 450
  21. 570
  22. 280
  23. 1430
  24. 700
  25. 750
  26. 600
  27. 1950
  28. 420
  29. 900
  30. 1440
  31. 1000
  32. 300
  33. 1400
  34. 910
  35. 990
  36. 440
  37. 770
  38. 900
  39. 1260
  40. 360

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