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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 753 · 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 × 14 =
  2. 2.8 × 75 =
  3. 3.65 × 32 =
  4. 4.55 × 28 =
  5. 5.24 × 35 =
  6. 6.15 × 36 =
  7. 7.15 × 8 =
  8. 8.35 × 36 =
  9. 9.22 × 15 =
  10. 10.35 × 36 =
  11. 11.35 × 8 =
  12. 12.35 × 26 =
  13. 13.10 × 55 =
  14. 14.6 × 65 =
  15. 15.14 × 65 =
  16. 16.125 × 30 =
  17. 17.26 × 65 =
  18. 18.12 × 125 =
  19. 19.40 × 25 =
  20. 20.12 × 65 =
  21. 21.26 × 35 =
  22. 22.125 × 26 =
  23. 23.6 × 35 =
  24. 24.55 × 10 =
  25. 25.125 × 16 =
  26. 26.15 × 12 =
  27. 27.25 × 6 =
  28. 28.30 × 75 =
  29. 29.10 × 15 =
  30. 30.6 × 15 =
  31. 31.24 × 75 =
  32. 32.45 × 22 =
  33. 33.15 × 40 =
  34. 34.8 × 75 =
  35. 35.18 × 125 =
  36. 36.38 × 25 =
  37. 37.15 × 36 =
  38. 38.20 × 65 =
  39. 39.125 × 38 =
  40. 40.32 × 35 =

Answer key

  1. 350
  2. 600
  3. 2080
  4. 1540
  5. 840
  6. 540
  7. 120
  8. 1260
  9. 330
  10. 1260
  11. 280
  12. 910
  13. 550
  14. 390
  15. 910
  16. 3750
  17. 1690
  18. 1500
  19. 1000
  20. 780
  21. 910
  22. 3250
  23. 210
  24. 550
  25. 2000
  26. 180
  27. 150
  28. 2250
  29. 150
  30. 90
  31. 1800
  32. 990
  33. 600
  34. 600
  35. 2250
  36. 950
  37. 540
  38. 1300
  39. 4750
  40. 1120

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