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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 345 · 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 × 26 =
  2. 2.16 × 55 =
  3. 3.12 × 125 =
  4. 4.18 × 25 =
  5. 5.40 × 35 =
  6. 6.26 × 65 =
  7. 7.40 × 75 =
  8. 8.12 × 55 =
  9. 9.125 × 36 =
  10. 10.12 × 35 =
  11. 11.25 × 8 =
  12. 12.8 × 45 =
  13. 13.14 × 65 =
  14. 14.15 × 20 =
  15. 15.6 × 25 =
  16. 16.18 × 55 =
  17. 17.65 × 28 =
  18. 18.25 × 40 =
  19. 19.20 × 15 =
  20. 20.8 × 45 =
  21. 21.45 × 18 =
  22. 22.65 × 10 =
  23. 23.34 × 125 =
  24. 24.38 × 75 =
  25. 25.65 × 8 =
  26. 26.16 × 45 =
  27. 27.26 × 25 =
  28. 28.65 × 12 =
  29. 29.32 × 25 =
  30. 30.26 × 35 =
  31. 31.20 × 45 =
  32. 32.12 × 45 =
  33. 33.25 × 34 =
  34. 34.65 × 20 =
  35. 35.15 × 32 =
  36. 36.12 × 45 =
  37. 37.8 × 125 =
  38. 38.15 × 26 =
  39. 39.35 × 10 =
  40. 40.30 × 35 =

Answer key

  1. 1430
  2. 880
  3. 1500
  4. 450
  5. 1400
  6. 1690
  7. 3000
  8. 660
  9. 4500
  10. 420
  11. 200
  12. 360
  13. 910
  14. 300
  15. 150
  16. 990
  17. 1820
  18. 1000
  19. 300
  20. 360
  21. 810
  22. 650
  23. 4250
  24. 2850
  25. 520
  26. 720
  27. 650
  28. 780
  29. 800
  30. 910
  31. 900
  32. 540
  33. 850
  34. 1300
  35. 480
  36. 540
  37. 1000
  38. 390
  39. 350
  40. 1050

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