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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 240 · 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. 1.30 × 65 =
  2. 2.38 × 75 =
  3. 3.10 × 75 =
  4. 4.10 × 45 =
  5. 5.32 × 125 =
  6. 6.32 × 15 =
  7. 7.34 × 75 =
  8. 8.75 × 36 =
  9. 9.125 × 26 =
  10. 10.55 × 24 =
  11. 11.8 × 15 =
  12. 12.25 × 8 =
  13. 13.45 × 28 =
  14. 14.40 × 55 =
  15. 15.65 × 10 =
  16. 16.15 × 10 =
  17. 17.125 × 28 =
  18. 18.30 × 25 =
  19. 19.15 × 6 =
  20. 20.45 × 36 =
  21. 21.36 × 125 =
  22. 22.65 × 24 =
  23. 23.35 × 30 =
  24. 24.15 × 36 =
  25. 25.45 × 30 =
  26. 26.32 × 55 =
  27. 27.45 × 26 =
  28. 28.35 × 8 =
  29. 29.55 × 18 =
  30. 30.24 × 125 =
  31. 31.125 × 20 =
  32. 32.65 × 8 =
  33. 33.22 × 25 =
  34. 34.6 × 35 =
  35. 35.15 × 16 =
  36. 36.12 × 45 =
  37. 37.30 × 25 =
  38. 38.22 × 75 =
  39. 39.20 × 35 =
  40. 40.14 × 25 =

Answer key

  1. 1950
  2. 2850
  3. 750
  4. 450
  5. 4000
  6. 480
  7. 2550
  8. 2700
  9. 3250
  10. 1320
  11. 120
  12. 200
  13. 1260
  14. 2200
  15. 650
  16. 150
  17. 3500
  18. 750
  19. 90
  20. 1620
  21. 4500
  22. 1560
  23. 1050
  24. 540
  25. 1350
  26. 1760
  27. 1170
  28. 280
  29. 990
  30. 3000
  31. 2500
  32. 520
  33. 550
  34. 210
  35. 240
  36. 540
  37. 750
  38. 1650
  39. 700
  40. 350

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