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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 217 · 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. 1.16 × 65 =
  2. 2.45 × 14 =
  3. 3.16 × 125 =
  4. 4.55 × 6 =
  5. 5.28 × 75 =
  6. 6.75 × 6 =
  7. 7.36 × 35 =
  8. 8.26 × 25 =
  9. 9.16 × 45 =
  10. 10.15 × 16 =
  11. 11.6 × 55 =
  12. 12.15 × 14 =
  13. 13.6 × 65 =
  14. 14.25 × 26 =
  15. 15.8 × 125 =
  16. 16.25 × 32 =
  17. 17.32 × 25 =
  18. 18.15 × 6 =
  19. 19.25 × 10 =
  20. 20.45 × 6 =
  21. 21.45 × 8 =
  22. 22.18 × 125 =
  23. 23.38 × 25 =
  24. 24.15 × 14 =
  25. 25.75 × 12 =
  26. 26.28 × 25 =
  27. 27.34 × 15 =
  28. 28.55 × 10 =
  29. 29.16 × 45 =
  30. 30.65 × 18 =
  31. 31.45 × 14 =
  32. 32.35 × 26 =
  33. 33.12 × 35 =
  34. 34.125 × 12 =
  35. 35.15 × 40 =
  36. 36.125 × 34 =
  37. 37.35 × 22 =
  38. 38.6 × 75 =
  39. 39.125 × 24 =
  40. 40.20 × 25 =

Answer key

  1. 1040
  2. 630
  3. 2000
  4. 330
  5. 2100
  6. 450
  7. 1260
  8. 650
  9. 720
  10. 240
  11. 330
  12. 210
  13. 390
  14. 650
  15. 1000
  16. 800
  17. 800
  18. 90
  19. 250
  20. 270
  21. 360
  22. 2250
  23. 950
  24. 210
  25. 900
  26. 700
  27. 510
  28. 550
  29. 720
  30. 1170
  31. 630
  32. 910
  33. 420
  34. 1500
  35. 600
  36. 4250
  37. 770
  38. 450
  39. 3000
  40. 500

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