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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 31 · 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. 1.15 × 8 =
  2. 2.75 × 30 =
  3. 3.20 × 35 =
  4. 4.15 × 38 =
  5. 5.15 × 10 =
  6. 6.40 × 35 =
  7. 7.125 × 22 =
  8. 8.22 × 65 =
  9. 9.75 × 32 =
  10. 10.35 × 26 =
  11. 11.40 × 25 =
  12. 12.25 × 24 =
  13. 13.28 × 35 =
  14. 14.6 × 65 =
  15. 15.45 × 6 =
  16. 16.65 × 8 =
  17. 17.45 × 14 =
  18. 18.25 × 16 =
  19. 19.35 × 12 =
  20. 20.36 × 125 =
  21. 21.35 × 12 =
  22. 22.15 × 12 =
  23. 23.10 × 65 =
  24. 24.32 × 65 =
  25. 25.125 × 34 =
  26. 26.25 × 6 =
  27. 27.26 × 125 =
  28. 28.32 × 45 =
  29. 29.40 × 35 =
  30. 30.25 × 8 =
  31. 31.26 × 75 =
  32. 32.34 × 25 =
  33. 33.45 × 40 =
  34. 34.12 × 125 =
  35. 35.40 × 45 =
  36. 36.75 × 16 =
  37. 37.14 × 25 =
  38. 38.35 × 28 =
  39. 39.20 × 25 =
  40. 40.45 × 16 =

Answer key

  1. 120
  2. 2250
  3. 700
  4. 570
  5. 150
  6. 1400
  7. 2750
  8. 1430
  9. 2400
  10. 910
  11. 1000
  12. 600
  13. 980
  14. 390
  15. 270
  16. 520
  17. 630
  18. 400
  19. 420
  20. 4500
  21. 420
  22. 180
  23. 650
  24. 2080
  25. 4250
  26. 150
  27. 3250
  28. 1440
  29. 1400
  30. 200
  31. 1950
  32. 850
  33. 1800
  34. 1500
  35. 1800
  36. 1200
  37. 350
  38. 980
  39. 500
  40. 720

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