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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 215 · 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. 1.10 × 65 =
  2. 2.32 × 65 =
  3. 3.32 × 125 =
  4. 4.15 × 38 =
  5. 5.125 × 22 =
  6. 6.55 × 28 =
  7. 7.14 × 35 =
  8. 8.25 × 10 =
  9. 9.14 × 45 =
  10. 10.38 × 55 =
  11. 11.16 × 75 =
  12. 12.8 × 75 =
  13. 13.14 × 25 =
  14. 14.12 × 125 =
  15. 15.40 × 75 =
  16. 16.8 × 125 =
  17. 17.45 × 32 =
  18. 18.15 × 40 =
  19. 19.28 × 15 =
  20. 20.25 × 26 =
  21. 21.32 × 35 =
  22. 22.35 × 28 =
  23. 23.14 × 55 =
  24. 24.10 × 55 =
  25. 25.35 × 38 =
  26. 26.24 × 35 =
  27. 27.75 × 36 =
  28. 28.16 × 55 =
  29. 29.25 × 40 =
  30. 30.45 × 20 =
  31. 31.75 × 6 =
  32. 32.30 × 55 =
  33. 33.25 × 12 =
  34. 34.8 × 125 =
  35. 35.35 × 28 =
  36. 36.6 × 45 =
  37. 37.35 × 8 =
  38. 38.35 × 20 =
  39. 39.75 × 38 =
  40. 40.6 × 45 =

Answer key

  1. 650
  2. 2080
  3. 4000
  4. 570
  5. 2750
  6. 1540
  7. 490
  8. 250
  9. 630
  10. 2090
  11. 1200
  12. 600
  13. 350
  14. 1500
  15. 3000
  16. 1000
  17. 1440
  18. 600
  19. 420
  20. 650
  21. 1120
  22. 980
  23. 770
  24. 550
  25. 1330
  26. 840
  27. 2700
  28. 880
  29. 1000
  30. 900
  31. 450
  32. 1650
  33. 300
  34. 1000
  35. 980
  36. 270
  37. 280
  38. 700
  39. 2850
  40. 270

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