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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 401 · 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 × 6 =
  2. 2.75 × 30 =
  3. 3.14 × 15 =
  4. 4.45 × 34 =
  5. 5.40 × 55 =
  6. 6.35 × 14 =
  7. 7.65 × 18 =
  8. 8.35 × 36 =
  9. 9.125 × 22 =
  10. 10.65 × 10 =
  11. 11.65 × 20 =
  12. 12.36 × 25 =
  13. 13.30 × 75 =
  14. 14.45 × 26 =
  15. 15.26 × 15 =
  16. 16.65 × 8 =
  17. 17.20 × 125 =
  18. 18.28 × 125 =
  19. 19.65 × 12 =
  20. 20.15 × 12 =
  21. 21.125 × 32 =
  22. 22.25 × 28 =
  23. 23.55 × 24 =
  24. 24.45 × 34 =
  25. 25.125 × 40 =
  26. 26.24 × 65 =
  27. 27.35 × 20 =
  28. 28.125 × 40 =
  29. 29.20 × 25 =
  30. 30.16 × 45 =
  31. 31.35 × 8 =
  32. 32.15 × 18 =
  33. 33.25 × 12 =
  34. 34.65 × 34 =
  35. 35.15 × 30 =
  36. 36.32 × 55 =
  37. 37.15 × 38 =
  38. 38.36 × 15 =
  39. 39.25 × 26 =
  40. 40.25 × 14 =

Answer key

  1. 150
  2. 2250
  3. 210
  4. 1530
  5. 2200
  6. 490
  7. 1170
  8. 1260
  9. 2750
  10. 650
  11. 1300
  12. 900
  13. 2250
  14. 1170
  15. 390
  16. 520
  17. 2500
  18. 3500
  19. 780
  20. 180
  21. 4000
  22. 700
  23. 1320
  24. 1530
  25. 5000
  26. 1560
  27. 700
  28. 5000
  29. 500
  30. 720
  31. 280
  32. 270
  33. 300
  34. 2210
  35. 450
  36. 1760
  37. 570
  38. 540
  39. 650
  40. 350

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