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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 89 · 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. 1.28 × 25 =
  2. 2.24 × 55 =
  3. 3.22 × 55 =
  4. 4.65 × 10 =
  5. 5.30 × 15 =
  6. 6.125 × 18 =
  7. 7.35 × 36 =
  8. 8.14 × 35 =
  9. 9.12 × 75 =
  10. 10.40 × 25 =
  11. 11.55 × 14 =
  12. 12.38 × 45 =
  13. 13.24 × 15 =
  14. 14.75 × 28 =
  15. 15.45 × 32 =
  16. 16.125 × 6 =
  17. 17.25 × 26 =
  18. 18.6 × 55 =
  19. 19.14 × 125 =
  20. 20.25 × 32 =
  21. 21.55 × 26 =
  22. 22.15 × 8 =
  23. 23.28 × 15 =
  24. 24.75 × 28 =
  25. 25.14 × 45 =
  26. 26.45 × 10 =
  27. 27.16 × 55 =
  28. 28.28 × 125 =
  29. 29.15 × 22 =
  30. 30.125 × 8 =
  31. 31.125 × 38 =
  32. 32.36 × 65 =
  33. 33.25 × 6 =
  34. 34.35 × 40 =
  35. 35.75 × 20 =
  36. 36.35 × 30 =
  37. 37.25 × 14 =
  38. 38.45 × 10 =
  39. 39.6 × 25 =
  40. 40.10 × 15 =

Answer key

  1. 700
  2. 1320
  3. 1210
  4. 650
  5. 450
  6. 2250
  7. 1260
  8. 490
  9. 900
  10. 1000
  11. 770
  12. 1710
  13. 360
  14. 2100
  15. 1440
  16. 750
  17. 650
  18. 330
  19. 1750
  20. 800
  21. 1430
  22. 120
  23. 420
  24. 2100
  25. 630
  26. 450
  27. 880
  28. 3500
  29. 330
  30. 1000
  31. 4750
  32. 2340
  33. 150
  34. 1400
  35. 1500
  36. 1050
  37. 350
  38. 450
  39. 150
  40. 150

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