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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 341 · 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. 1.55 × 14 =
  2. 2.75 × 24 =
  3. 3.55 × 18 =
  4. 4.65 × 26 =
  5. 5.15 × 16 =
  6. 6.34 × 125 =
  7. 7.12 × 75 =
  8. 8.25 × 6 =
  9. 9.24 × 15 =
  10. 10.30 × 55 =
  11. 11.22 × 55 =
  12. 12.6 × 65 =
  13. 13.10 × 65 =
  14. 14.32 × 55 =
  15. 15.25 × 10 =
  16. 16.65 × 22 =
  17. 17.55 × 34 =
  18. 18.65 × 40 =
  19. 19.28 × 15 =
  20. 20.75 × 28 =
  21. 21.25 × 40 =
  22. 22.15 × 36 =
  23. 23.15 × 34 =
  24. 24.125 × 16 =
  25. 25.25 × 30 =
  26. 26.35 × 8 =
  27. 27.65 × 26 =
  28. 28.15 × 16 =
  29. 29.18 × 45 =
  30. 30.26 × 35 =
  31. 31.12 × 55 =
  32. 32.65 × 10 =
  33. 33.45 × 10 =
  34. 34.15 × 6 =
  35. 35.6 × 125 =
  36. 36.20 × 55 =
  37. 37.75 × 28 =
  38. 38.12 × 25 =
  39. 39.34 × 25 =
  40. 40.30 × 45 =

Answer key

  1. 770
  2. 1800
  3. 990
  4. 1690
  5. 240
  6. 4250
  7. 900
  8. 150
  9. 360
  10. 1650
  11. 1210
  12. 390
  13. 650
  14. 1760
  15. 250
  16. 1430
  17. 1870
  18. 2600
  19. 420
  20. 2100
  21. 1000
  22. 540
  23. 510
  24. 2000
  25. 750
  26. 280
  27. 1690
  28. 240
  29. 810
  30. 910
  31. 660
  32. 650
  33. 450
  34. 90
  35. 750
  36. 1100
  37. 2100
  38. 300
  39. 850
  40. 1350

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