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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 128 · 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 × 75 =
  2. 2.28 × 55 =
  3. 3.24 × 35 =
  4. 4.65 × 36 =
  5. 5.15 × 40 =
  6. 6.25 × 26 =
  7. 7.16 × 15 =
  8. 8.45 × 28 =
  9. 9.25 × 18 =
  10. 10.28 × 25 =
  11. 11.8 × 15 =
  12. 12.14 × 15 =
  13. 13.8 × 25 =
  14. 14.16 × 35 =
  15. 15.125 × 6 =
  16. 16.6 × 75 =
  17. 17.125 × 34 =
  18. 18.14 × 35 =
  19. 19.10 × 45 =
  20. 20.30 × 35 =
  21. 21.35 × 6 =
  22. 22.75 × 24 =
  23. 23.32 × 35 =
  24. 24.75 × 10 =
  25. 25.6 × 25 =
  26. 26.125 × 8 =
  27. 27.30 × 15 =
  28. 28.32 × 35 =
  29. 29.20 × 15 =
  30. 30.65 × 14 =
  31. 31.25 × 40 =
  32. 32.18 × 65 =
  33. 33.14 × 75 =
  34. 34.16 × 35 =
  35. 35.15 × 22 =
  36. 36.45 × 8 =
  37. 37.8 × 25 =
  38. 38.24 × 15 =
  39. 39.26 × 55 =
  40. 40.38 × 75 =

Answer key

  1. 2100
  2. 1540
  3. 840
  4. 2340
  5. 600
  6. 650
  7. 240
  8. 1260
  9. 450
  10. 700
  11. 120
  12. 210
  13. 200
  14. 560
  15. 750
  16. 450
  17. 4250
  18. 490
  19. 450
  20. 1050
  21. 210
  22. 1800
  23. 1120
  24. 750
  25. 150
  26. 1000
  27. 450
  28. 1120
  29. 300
  30. 910
  31. 1000
  32. 1170
  33. 1050
  34. 560
  35. 330
  36. 360
  37. 200
  38. 360
  39. 1430
  40. 2850

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