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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 94 · 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 × 28 =
  2. 2.20 × 45 =
  3. 3.12 × 25 =
  4. 4.65 × 26 =
  5. 5.14 × 65 =
  6. 6.125 × 26 =
  7. 7.65 × 34 =
  8. 8.30 × 75 =
  9. 9.125 × 12 =
  10. 10.45 × 34 =
  11. 11.75 × 34 =
  12. 12.125 × 8 =
  13. 13.35 × 36 =
  14. 14.12 × 65 =
  15. 15.75 × 10 =
  16. 16.32 × 35 =
  17. 17.125 × 36 =
  18. 18.65 × 10 =
  19. 19.24 × 55 =
  20. 20.35 × 12 =
  21. 21.36 × 75 =
  22. 22.15 × 28 =
  23. 23.75 × 18 =
  24. 24.15 × 36 =
  25. 25.20 × 25 =
  26. 26.34 × 125 =
  27. 27.24 × 65 =
  28. 28.10 × 75 =
  29. 29.38 × 65 =
  30. 30.75 × 36 =
  31. 31.20 × 35 =
  32. 32.45 × 16 =
  33. 33.32 × 125 =
  34. 34.18 × 75 =
  35. 35.16 × 15 =
  36. 36.12 × 65 =
  37. 37.6 × 25 =
  38. 38.125 × 40 =
  39. 39.25 × 22 =
  40. 40.125 × 38 =

Answer key

  1. 700
  2. 900
  3. 300
  4. 1690
  5. 910
  6. 3250
  7. 2210
  8. 2250
  9. 1500
  10. 1530
  11. 2550
  12. 1000
  13. 1260
  14. 780
  15. 750
  16. 1120
  17. 4500
  18. 650
  19. 1320
  20. 420
  21. 2700
  22. 420
  23. 1350
  24. 540
  25. 500
  26. 4250
  27. 1560
  28. 750
  29. 2470
  30. 2700
  31. 700
  32. 720
  33. 4000
  34. 1350
  35. 240
  36. 780
  37. 150
  38. 5000
  39. 550
  40. 4750

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