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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 302 · 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. 1.20 × 65 =
  2. 2.45 × 38 =
  3. 3.15 × 6 =
  4. 4.25 × 32 =
  5. 5.15 × 10 =
  6. 6.10 × 45 =
  7. 7.32 × 35 =
  8. 8.55 × 14 =
  9. 9.12 × 25 =
  10. 10.22 × 125 =
  11. 11.25 × 16 =
  12. 12.35 × 36 =
  13. 13.40 × 75 =
  14. 14.65 × 12 =
  15. 15.35 × 38 =
  16. 16.20 × 15 =
  17. 17.25 × 14 =
  18. 18.6 × 45 =
  19. 19.45 × 6 =
  20. 20.38 × 15 =
  21. 21.24 × 45 =
  22. 22.65 × 14 =
  23. 23.40 × 65 =
  24. 24.45 × 28 =
  25. 25.34 × 45 =
  26. 26.45 × 26 =
  27. 27.10 × 45 =
  28. 28.10 × 65 =
  29. 29.125 × 6 =
  30. 30.26 × 15 =
  31. 31.125 × 8 =
  32. 32.25 × 40 =
  33. 33.15 × 26 =
  34. 34.6 × 25 =
  35. 35.6 × 45 =
  36. 36.25 × 36 =
  37. 37.25 × 14 =
  38. 38.8 × 15 =
  39. 39.35 × 32 =
  40. 40.25 × 8 =

Answer key

  1. 1300
  2. 1710
  3. 90
  4. 800
  5. 150
  6. 450
  7. 1120
  8. 770
  9. 300
  10. 2750
  11. 400
  12. 1260
  13. 3000
  14. 780
  15. 1330
  16. 300
  17. 350
  18. 270
  19. 270
  20. 570
  21. 1080
  22. 910
  23. 2600
  24. 1260
  25. 1530
  26. 1170
  27. 450
  28. 650
  29. 750
  30. 390
  31. 1000
  32. 1000
  33. 390
  34. 150
  35. 270
  36. 900
  37. 350
  38. 120
  39. 1120
  40. 200

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