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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 420 · 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. 1.22 × 25 =
  2. 2.26 × 35 =
  3. 3.55 × 6 =
  4. 4.26 × 55 =
  5. 5.75 × 10 =
  6. 6.6 × 25 =
  7. 7.8 × 35 =
  8. 8.38 × 125 =
  9. 9.25 × 38 =
  10. 10.12 × 125 =
  11. 11.65 × 38 =
  12. 12.35 × 14 =
  13. 13.24 × 125 =
  14. 14.40 × 55 =
  15. 15.26 × 25 =
  16. 16.75 × 26 =
  17. 17.65 × 14 =
  18. 18.65 × 10 =
  19. 19.75 × 24 =
  20. 20.6 × 65 =
  21. 21.32 × 35 =
  22. 22.65 × 32 =
  23. 23.28 × 65 =
  24. 24.24 × 55 =
  25. 25.14 × 75 =
  26. 26.65 × 8 =
  27. 27.55 × 18 =
  28. 28.26 × 15 =
  29. 29.55 × 12 =
  30. 30.125 × 32 =
  31. 31.55 × 40 =
  32. 32.25 × 10 =
  33. 33.15 × 18 =
  34. 34.75 × 30 =
  35. 35.125 × 10 =
  36. 36.22 × 125 =
  37. 37.28 × 25 =
  38. 38.22 × 45 =
  39. 39.20 × 25 =
  40. 40.6 × 65 =

Answer key

  1. 550
  2. 910
  3. 330
  4. 1430
  5. 750
  6. 150
  7. 280
  8. 4750
  9. 950
  10. 1500
  11. 2470
  12. 490
  13. 3000
  14. 2200
  15. 650
  16. 1950
  17. 910
  18. 650
  19. 1800
  20. 390
  21. 1120
  22. 2080
  23. 1820
  24. 1320
  25. 1050
  26. 520
  27. 990
  28. 390
  29. 660
  30. 4000
  31. 2200
  32. 250
  33. 270
  34. 2250
  35. 1250
  36. 2750
  37. 700
  38. 990
  39. 500
  40. 390

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