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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 488 · 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. 1.26 × 45 =
  2. 2.15 × 8 =
  3. 3.55 × 26 =
  4. 4.14 × 45 =
  5. 5.14 × 125 =
  6. 6.22 × 35 =
  7. 7.34 × 35 =
  8. 8.35 × 20 =
  9. 9.25 × 10 =
  10. 10.30 × 35 =
  11. 11.75 × 32 =
  12. 12.125 × 26 =
  13. 13.25 × 24 =
  14. 14.30 × 125 =
  15. 15.12 × 125 =
  16. 16.75 × 34 =
  17. 17.35 × 16 =
  18. 18.15 × 12 =
  19. 19.65 × 14 =
  20. 20.55 × 28 =
  21. 21.32 × 75 =
  22. 22.22 × 35 =
  23. 23.16 × 75 =
  24. 24.22 × 15 =
  25. 25.35 × 28 =
  26. 26.6 × 55 =
  27. 27.40 × 25 =
  28. 28.38 × 125 =
  29. 29.36 × 15 =
  30. 30.35 × 20 =
  31. 31.15 × 38 =
  32. 32.25 × 14 =
  33. 33.36 × 75 =
  34. 34.35 × 24 =
  35. 35.36 × 55 =
  36. 36.38 × 25 =
  37. 37.25 × 26 =
  38. 38.12 × 25 =
  39. 39.25 × 32 =
  40. 40.55 × 22 =

Answer key

  1. 1170
  2. 120
  3. 1430
  4. 630
  5. 1750
  6. 770
  7. 1190
  8. 700
  9. 250
  10. 1050
  11. 2400
  12. 3250
  13. 600
  14. 3750
  15. 1500
  16. 2550
  17. 560
  18. 180
  19. 910
  20. 1540
  21. 2400
  22. 770
  23. 1200
  24. 330
  25. 980
  26. 330
  27. 1000
  28. 4750
  29. 540
  30. 700
  31. 570
  32. 350
  33. 2700
  34. 840
  35. 1980
  36. 950
  37. 650
  38. 300
  39. 800
  40. 1210

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