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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 510 · 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. 1.16 × 75 =
  2. 2.32 × 75 =
  3. 3.8 × 55 =
  4. 4.18 × 45 =
  5. 5.32 × 55 =
  6. 6.30 × 55 =
  7. 7.24 × 65 =
  8. 8.65 × 40 =
  9. 9.16 × 125 =
  10. 10.125 × 16 =
  11. 11.55 × 28 =
  12. 12.35 × 36 =
  13. 13.125 × 24 =
  14. 14.45 × 10 =
  15. 15.25 × 38 =
  16. 16.65 × 28 =
  17. 17.15 × 18 =
  18. 18.16 × 15 =
  19. 19.30 × 35 =
  20. 20.24 × 55 =
  21. 21.24 × 15 =
  22. 22.65 × 18 =
  23. 23.65 × 18 =
  24. 24.75 × 30 =
  25. 25.26 × 35 =
  26. 26.38 × 35 =
  27. 27.30 × 35 =
  28. 28.15 × 12 =
  29. 29.26 × 125 =
  30. 30.15 × 32 =
  31. 31.15 × 24 =
  32. 32.65 × 40 =
  33. 33.15 × 32 =
  34. 34.14 × 35 =
  35. 35.16 × 45 =
  36. 36.14 × 75 =
  37. 37.36 × 125 =
  38. 38.24 × 15 =
  39. 39.125 × 6 =
  40. 40.20 × 55 =

Answer key

  1. 1200
  2. 2400
  3. 440
  4. 810
  5. 1760
  6. 1650
  7. 1560
  8. 2600
  9. 2000
  10. 2000
  11. 1540
  12. 1260
  13. 3000
  14. 450
  15. 950
  16. 1820
  17. 270
  18. 240
  19. 1050
  20. 1320
  21. 360
  22. 1170
  23. 1170
  24. 2250
  25. 910
  26. 1330
  27. 1050
  28. 180
  29. 3250
  30. 480
  31. 360
  32. 2600
  33. 480
  34. 490
  35. 720
  36. 1050
  37. 4500
  38. 360
  39. 750
  40. 1100

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