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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 628 · 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 × 34 =
  2. 2.14 × 45 =
  3. 3.30 × 45 =
  4. 4.55 × 8 =
  5. 5.12 × 55 =
  6. 6.65 × 38 =
  7. 7.26 × 25 =
  8. 8.45 × 22 =
  9. 9.6 × 15 =
  10. 10.35 × 18 =
  11. 11.75 × 34 =
  12. 12.38 × 65 =
  13. 13.10 × 75 =
  14. 14.45 × 10 =
  15. 15.125 × 36 =
  16. 16.34 × 25 =
  17. 17.14 × 65 =
  18. 18.55 × 18 =
  19. 19.18 × 55 =
  20. 20.22 × 15 =
  21. 21.40 × 75 =
  22. 22.30 × 35 =
  23. 23.15 × 6 =
  24. 24.55 × 36 =
  25. 25.25 × 18 =
  26. 26.12 × 65 =
  27. 27.55 × 20 =
  28. 28.28 × 45 =
  29. 29.75 × 18 =
  30. 30.18 × 125 =
  31. 31.45 × 34 =
  32. 32.35 × 24 =
  33. 33.18 × 25 =
  34. 34.15 × 14 =
  35. 35.40 × 75 =
  36. 36.125 × 40 =
  37. 37.26 × 35 =
  38. 38.40 × 25 =
  39. 39.6 × 125 =
  40. 40.65 × 10 =

Answer key

  1. 850
  2. 630
  3. 1350
  4. 440
  5. 660
  6. 2470
  7. 650
  8. 990
  9. 90
  10. 630
  11. 2550
  12. 2470
  13. 750
  14. 450
  15. 4500
  16. 850
  17. 910
  18. 990
  19. 990
  20. 330
  21. 3000
  22. 1050
  23. 90
  24. 1980
  25. 450
  26. 780
  27. 1100
  28. 1260
  29. 1350
  30. 2250
  31. 1530
  32. 840
  33. 450
  34. 210
  35. 3000
  36. 5000
  37. 910
  38. 1000
  39. 750
  40. 650

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