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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 773 · 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. 1.75 × 26 =
  2. 2.12 × 15 =
  3. 3.24 × 15 =
  4. 4.32 × 55 =
  5. 5.30 × 125 =
  6. 6.38 × 15 =
  7. 7.125 × 22 =
  8. 8.75 × 12 =
  9. 9.40 × 75 =
  10. 10.65 × 28 =
  11. 11.65 × 28 =
  12. 12.24 × 55 =
  13. 13.65 × 6 =
  14. 14.22 × 15 =
  15. 15.125 × 34 =
  16. 16.10 × 35 =
  17. 17.45 × 40 =
  18. 18.18 × 75 =
  19. 19.18 × 55 =
  20. 20.45 × 34 =
  21. 21.55 × 24 =
  22. 22.15 × 24 =
  23. 23.34 × 15 =
  24. 24.14 × 55 =
  25. 25.40 × 65 =
  26. 26.14 × 15 =
  27. 27.14 × 75 =
  28. 28.36 × 35 =
  29. 29.40 × 15 =
  30. 30.125 × 28 =
  31. 31.55 × 26 =
  32. 32.15 × 26 =
  33. 33.28 × 65 =
  34. 34.15 × 14 =
  35. 35.20 × 15 =
  36. 36.34 × 55 =
  37. 37.34 × 15 =
  38. 38.8 × 25 =
  39. 39.65 × 40 =
  40. 40.75 × 28 =

Answer key

  1. 1950
  2. 180
  3. 360
  4. 1760
  5. 3750
  6. 570
  7. 2750
  8. 900
  9. 3000
  10. 1820
  11. 1820
  12. 1320
  13. 390
  14. 330
  15. 4250
  16. 350
  17. 1800
  18. 1350
  19. 990
  20. 1530
  21. 1320
  22. 360
  23. 510
  24. 770
  25. 2600
  26. 210
  27. 1050
  28. 1260
  29. 600
  30. 3500
  31. 1430
  32. 390
  33. 1820
  34. 210
  35. 300
  36. 1870
  37. 510
  38. 200
  39. 2600
  40. 2100

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