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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 151 · 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. 1.55 × 40 =
  2. 2.34 × 45 =
  3. 3.25 × 10 =
  4. 4.6 × 125 =
  5. 5.75 × 22 =
  6. 6.10 × 45 =
  7. 7.25 × 26 =
  8. 8.30 × 45 =
  9. 9.45 × 10 =
  10. 10.35 × 36 =
  11. 11.45 × 22 =
  12. 12.12 × 45 =
  13. 13.12 × 25 =
  14. 14.45 × 28 =
  15. 15.35 × 20 =
  16. 16.15 × 10 =
  17. 17.30 × 55 =
  18. 18.36 × 35 =
  19. 19.20 × 45 =
  20. 20.8 × 25 =
  21. 21.15 × 12 =
  22. 22.14 × 35 =
  23. 23.65 × 26 =
  24. 24.125 × 12 =
  25. 25.22 × 65 =
  26. 26.25 × 6 =
  27. 27.8 × 35 =
  28. 28.55 × 34 =
  29. 29.24 × 65 =
  30. 30.15 × 10 =
  31. 31.35 × 36 =
  32. 32.55 × 40 =
  33. 33.18 × 15 =
  34. 34.8 × 125 =
  35. 35.40 × 75 =
  36. 36.15 × 14 =
  37. 37.35 × 20 =
  38. 38.125 × 36 =
  39. 39.55 × 18 =
  40. 40.8 × 25 =

Answer key

  1. 2200
  2. 1530
  3. 250
  4. 750
  5. 1650
  6. 450
  7. 650
  8. 1350
  9. 450
  10. 1260
  11. 990
  12. 540
  13. 300
  14. 1260
  15. 700
  16. 150
  17. 1650
  18. 1260
  19. 900
  20. 200
  21. 180
  22. 490
  23. 1690
  24. 1500
  25. 1430
  26. 150
  27. 280
  28. 1870
  29. 1560
  30. 150
  31. 1260
  32. 2200
  33. 270
  34. 1000
  35. 3000
  36. 210
  37. 700
  38. 4500
  39. 990
  40. 200

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