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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 797 · 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. 1.14 × 65 =
  2. 2.125 × 10 =
  3. 3.55 × 28 =
  4. 4.36 × 55 =
  5. 5.75 × 22 =
  6. 6.65 × 30 =
  7. 7.55 × 10 =
  8. 8.15 × 6 =
  9. 9.75 × 30 =
  10. 10.10 × 25 =
  11. 11.6 × 125 =
  12. 12.55 × 20 =
  13. 13.6 × 65 =
  14. 14.65 × 26 =
  15. 15.25 × 28 =
  16. 16.14 × 35 =
  17. 17.24 × 125 =
  18. 18.15 × 26 =
  19. 19.45 × 16 =
  20. 20.75 × 22 =
  21. 21.15 × 26 =
  22. 22.15 × 8 =
  23. 23.125 × 20 =
  24. 24.125 × 32 =
  25. 25.16 × 45 =
  26. 26.30 × 45 =
  27. 27.55 × 6 =
  28. 28.65 × 14 =
  29. 29.35 × 10 =
  30. 30.6 × 15 =
  31. 31.65 × 32 =
  32. 32.24 × 75 =
  33. 33.55 × 40 =
  34. 34.10 × 125 =
  35. 35.14 × 25 =
  36. 36.65 × 8 =
  37. 37.45 × 28 =
  38. 38.65 × 18 =
  39. 39.34 × 35 =
  40. 40.65 × 36 =

Answer key

  1. 910
  2. 1250
  3. 1540
  4. 1980
  5. 1650
  6. 1950
  7. 550
  8. 90
  9. 2250
  10. 250
  11. 750
  12. 1100
  13. 390
  14. 1690
  15. 700
  16. 490
  17. 3000
  18. 390
  19. 720
  20. 1650
  21. 390
  22. 120
  23. 2500
  24. 4000
  25. 720
  26. 1350
  27. 330
  28. 910
  29. 350
  30. 90
  31. 2080
  32. 1800
  33. 2200
  34. 1250
  35. 350
  36. 520
  37. 1260
  38. 1170
  39. 1190
  40. 2340

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