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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 633 · 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. 1.65 × 40 =
  2. 2.15 × 20 =
  3. 3.38 × 75 =
  4. 4.65 × 20 =
  5. 5.36 × 35 =
  6. 6.125 × 40 =
  7. 7.65 × 12 =
  8. 8.125 × 14 =
  9. 9.8 × 125 =
  10. 10.20 × 25 =
  11. 11.65 × 18 =
  12. 12.16 × 125 =
  13. 13.65 × 26 =
  14. 14.75 × 38 =
  15. 15.125 × 10 =
  16. 16.24 × 35 =
  17. 17.32 × 75 =
  18. 18.40 × 45 =
  19. 19.125 × 32 =
  20. 20.55 × 32 =
  21. 21.75 × 24 =
  22. 22.26 × 25 =
  23. 23.25 × 30 =
  24. 24.22 × 125 =
  25. 25.35 × 38 =
  26. 26.12 × 25 =
  27. 27.65 × 26 =
  28. 28.28 × 125 =
  29. 29.125 × 28 =
  30. 30.6 × 25 =
  31. 31.45 × 34 =
  32. 32.125 × 14 =
  33. 33.20 × 25 =
  34. 34.14 × 15 =
  35. 35.30 × 45 =
  36. 36.34 × 125 =
  37. 37.25 × 10 =
  38. 38.65 × 14 =
  39. 39.10 × 45 =
  40. 40.55 × 40 =

Answer key

  1. 2600
  2. 300
  3. 2850
  4. 1300
  5. 1260
  6. 5000
  7. 780
  8. 1750
  9. 1000
  10. 500
  11. 1170
  12. 2000
  13. 1690
  14. 2850
  15. 1250
  16. 840
  17. 2400
  18. 1800
  19. 4000
  20. 1760
  21. 1800
  22. 650
  23. 750
  24. 2750
  25. 1330
  26. 300
  27. 1690
  28. 3500
  29. 3500
  30. 150
  31. 1530
  32. 1750
  33. 500
  34. 210
  35. 1350
  36. 4250
  37. 250
  38. 910
  39. 450
  40. 2200

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