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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 280 · 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. 1.38 × 125 =
  2. 2.45 × 18 =
  3. 3.75 × 6 =
  4. 4.36 × 25 =
  5. 5.55 × 12 =
  6. 6.45 × 34 =
  7. 7.35 × 12 =
  8. 8.36 × 75 =
  9. 9.65 × 18 =
  10. 10.25 × 40 =
  11. 11.22 × 75 =
  12. 12.35 × 20 =
  13. 13.10 × 65 =
  14. 14.40 × 15 =
  15. 15.35 × 38 =
  16. 16.24 × 25 =
  17. 17.12 × 35 =
  18. 18.16 × 35 =
  19. 19.34 × 55 =
  20. 20.28 × 125 =
  21. 21.36 × 15 =
  22. 22.45 × 8 =
  23. 23.35 × 32 =
  24. 24.25 × 20 =
  25. 25.65 × 26 =
  26. 26.125 × 12 =
  27. 27.38 × 65 =
  28. 28.45 × 28 =
  29. 29.40 × 75 =
  30. 30.30 × 65 =
  31. 31.10 × 55 =
  32. 32.125 × 18 =
  33. 33.14 × 25 =
  34. 34.55 × 24 =
  35. 35.75 × 10 =
  36. 36.15 × 30 =
  37. 37.20 × 55 =
  38. 38.25 × 12 =
  39. 39.55 × 34 =
  40. 40.8 × 125 =

Answer key

  1. 4750
  2. 810
  3. 450
  4. 900
  5. 660
  6. 1530
  7. 420
  8. 2700
  9. 1170
  10. 1000
  11. 1650
  12. 700
  13. 650
  14. 600
  15. 1330
  16. 600
  17. 420
  18. 560
  19. 1870
  20. 3500
  21. 540
  22. 360
  23. 1120
  24. 500
  25. 1690
  26. 1500
  27. 2470
  28. 1260
  29. 3000
  30. 1950
  31. 550
  32. 2250
  33. 350
  34. 1320
  35. 750
  36. 450
  37. 1100
  38. 300
  39. 1870
  40. 1000

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