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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 691 · 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. 1.15 × 34 =
  2. 2.25 × 16 =
  3. 3.25 × 8 =
  4. 4.15 × 28 =
  5. 5.75 × 40 =
  6. 6.35 × 22 =
  7. 7.45 × 22 =
  8. 8.10 × 15 =
  9. 9.55 × 14 =
  10. 10.125 × 10 =
  11. 11.26 × 35 =
  12. 12.75 × 12 =
  13. 13.125 × 12 =
  14. 14.65 × 26 =
  15. 15.40 × 45 =
  16. 16.15 × 12 =
  17. 17.35 × 24 =
  18. 18.75 × 30 =
  19. 19.125 × 6 =
  20. 20.75 × 10 =
  21. 21.25 × 6 =
  22. 22.22 × 25 =
  23. 23.75 × 8 =
  24. 24.15 × 36 =
  25. 25.75 × 28 =
  26. 26.20 × 75 =
  27. 27.14 × 125 =
  28. 28.8 × 25 =
  29. 29.45 × 40 =
  30. 30.125 × 30 =
  31. 31.38 × 45 =
  32. 32.38 × 35 =
  33. 33.30 × 15 =
  34. 34.65 × 16 =
  35. 35.15 × 26 =
  36. 36.15 × 40 =
  37. 37.35 × 28 =
  38. 38.26 × 15 =
  39. 39.35 × 10 =
  40. 40.8 × 15 =

Answer key

  1. 510
  2. 400
  3. 200
  4. 420
  5. 3000
  6. 770
  7. 990
  8. 150
  9. 770
  10. 1250
  11. 910
  12. 900
  13. 1500
  14. 1690
  15. 1800
  16. 180
  17. 840
  18. 2250
  19. 750
  20. 750
  21. 150
  22. 550
  23. 600
  24. 540
  25. 2100
  26. 1500
  27. 1750
  28. 200
  29. 1800
  30. 3750
  31. 1710
  32. 1330
  33. 450
  34. 1040
  35. 390
  36. 600
  37. 980
  38. 390
  39. 350
  40. 120

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