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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 313 · 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. 1.36 × 35 =
  2. 2.30 × 55 =
  3. 3.75 × 18 =
  4. 4.75 × 12 =
  5. 5.22 × 35 =
  6. 6.55 × 30 =
  7. 7.40 × 55 =
  8. 8.45 × 6 =
  9. 9.16 × 25 =
  10. 10.125 × 20 =
  11. 11.26 × 125 =
  12. 12.75 × 30 =
  13. 13.55 × 40 =
  14. 14.28 × 55 =
  15. 15.15 × 16 =
  16. 16.75 × 10 =
  17. 17.22 × 65 =
  18. 18.24 × 35 =
  19. 19.15 × 30 =
  20. 20.38 × 35 =
  21. 21.15 × 28 =
  22. 22.8 × 15 =
  23. 23.34 × 55 =
  24. 24.12 × 55 =
  25. 25.125 × 14 =
  26. 26.32 × 125 =
  27. 27.12 × 75 =
  28. 28.45 × 16 =
  29. 29.35 × 28 =
  30. 30.125 × 26 =
  31. 31.55 × 12 =
  32. 32.34 × 125 =
  33. 33.125 × 16 =
  34. 34.32 × 55 =
  35. 35.16 × 15 =
  36. 36.6 × 65 =
  37. 37.34 × 15 =
  38. 38.26 × 45 =
  39. 39.34 × 55 =
  40. 40.35 × 22 =

Answer key

  1. 1260
  2. 1650
  3. 1350
  4. 900
  5. 770
  6. 1650
  7. 2200
  8. 270
  9. 400
  10. 2500
  11. 3250
  12. 2250
  13. 2200
  14. 1540
  15. 240
  16. 750
  17. 1430
  18. 840
  19. 450
  20. 1330
  21. 420
  22. 120
  23. 1870
  24. 660
  25. 1750
  26. 4000
  27. 900
  28. 720
  29. 980
  30. 3250
  31. 660
  32. 4250
  33. 2000
  34. 1760
  35. 240
  36. 390
  37. 510
  38. 1170
  39. 1870
  40. 770

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