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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 322 · 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. 1.10 × 35 =
  2. 2.40 × 15 =
  3. 3.75 × 34 =
  4. 4.55 × 14 =
  5. 5.15 × 38 =
  6. 6.55 × 10 =
  7. 7.65 × 10 =
  8. 8.55 × 38 =
  9. 9.38 × 45 =
  10. 10.24 × 55 =
  11. 11.15 × 18 =
  12. 12.12 × 65 =
  13. 13.22 × 65 =
  14. 14.25 × 20 =
  15. 15.45 × 6 =
  16. 16.36 × 25 =
  17. 17.26 × 35 =
  18. 18.75 × 8 =
  19. 19.36 × 25 =
  20. 20.25 × 34 =
  21. 21.45 × 20 =
  22. 22.25 × 28 =
  23. 23.25 × 32 =
  24. 24.14 × 75 =
  25. 25.22 × 45 =
  26. 26.45 × 10 =
  27. 27.35 × 26 =
  28. 28.22 × 125 =
  29. 29.45 × 8 =
  30. 30.45 × 36 =
  31. 31.25 × 26 =
  32. 32.35 × 16 =
  33. 33.125 × 30 =
  34. 34.15 × 40 =
  35. 35.75 × 16 =
  36. 36.12 × 125 =
  37. 37.12 × 125 =
  38. 38.8 × 55 =
  39. 39.125 × 34 =
  40. 40.25 × 6 =

Answer key

  1. 350
  2. 600
  3. 2550
  4. 770
  5. 570
  6. 550
  7. 650
  8. 2090
  9. 1710
  10. 1320
  11. 270
  12. 780
  13. 1430
  14. 500
  15. 270
  16. 900
  17. 910
  18. 600
  19. 900
  20. 850
  21. 900
  22. 700
  23. 800
  24. 1050
  25. 990
  26. 450
  27. 910
  28. 2750
  29. 360
  30. 1620
  31. 650
  32. 560
  33. 3750
  34. 600
  35. 1200
  36. 1500
  37. 1500
  38. 440
  39. 4250
  40. 150

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