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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 377 · 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. 1.25 × 36 =
  2. 2.26 × 35 =
  3. 3.15 × 16 =
  4. 4.18 × 15 =
  5. 5.24 × 25 =
  6. 6.12 × 45 =
  7. 7.26 × 55 =
  8. 8.36 × 45 =
  9. 9.24 × 35 =
  10. 10.75 × 12 =
  11. 11.10 × 75 =
  12. 12.45 × 32 =
  13. 13.10 × 15 =
  14. 14.30 × 75 =
  15. 15.26 × 65 =
  16. 16.22 × 75 =
  17. 17.18 × 55 =
  18. 18.12 × 65 =
  19. 19.8 × 45 =
  20. 20.26 × 65 =
  21. 21.32 × 35 =
  22. 22.65 × 12 =
  23. 23.25 × 24 =
  24. 24.125 × 22 =
  25. 25.25 × 16 =
  26. 26.22 × 75 =
  27. 27.55 × 32 =
  28. 28.25 × 10 =
  29. 29.125 × 14 =
  30. 30.12 × 35 =
  31. 31.125 × 30 =
  32. 32.65 × 14 =
  33. 33.15 × 24 =
  34. 34.20 × 35 =
  35. 35.65 × 34 =
  36. 36.15 × 22 =
  37. 37.45 × 12 =
  38. 38.8 × 15 =
  39. 39.125 × 36 =
  40. 40.40 × 55 =

Answer key

  1. 900
  2. 910
  3. 240
  4. 270
  5. 600
  6. 540
  7. 1430
  8. 1620
  9. 840
  10. 900
  11. 750
  12. 1440
  13. 150
  14. 2250
  15. 1690
  16. 1650
  17. 990
  18. 780
  19. 360
  20. 1690
  21. 1120
  22. 780
  23. 600
  24. 2750
  25. 400
  26. 1650
  27. 1760
  28. 250
  29. 1750
  30. 420
  31. 3750
  32. 910
  33. 360
  34. 700
  35. 2210
  36. 330
  37. 540
  38. 120
  39. 4500
  40. 2200

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