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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 830 · 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. 1.65 × 6 =
  2. 2.15 × 20 =
  3. 3.16 × 55 =
  4. 4.125 × 30 =
  5. 5.125 × 22 =
  6. 6.10 × 25 =
  7. 7.10 × 45 =
  8. 8.12 × 25 =
  9. 9.36 × 25 =
  10. 10.15 × 32 =
  11. 11.22 × 25 =
  12. 12.15 × 24 =
  13. 13.16 × 45 =
  14. 14.40 × 15 =
  15. 15.6 × 35 =
  16. 16.24 × 125 =
  17. 17.15 × 30 =
  18. 18.18 × 35 =
  19. 19.18 × 55 =
  20. 20.45 × 24 =
  21. 21.20 × 65 =
  22. 22.45 × 6 =
  23. 23.55 × 36 =
  24. 24.26 × 75 =
  25. 25.15 × 26 =
  26. 26.65 × 34 =
  27. 27.15 × 8 =
  28. 28.35 × 6 =
  29. 29.65 × 28 =
  30. 30.55 × 40 =
  31. 31.28 × 15 =
  32. 32.25 × 38 =
  33. 33.45 × 26 =
  34. 34.12 × 15 =
  35. 35.55 × 8 =
  36. 36.25 × 34 =
  37. 37.20 × 45 =
  38. 38.55 × 10 =
  39. 39.12 × 45 =
  40. 40.65 × 18 =

Answer key

  1. 390
  2. 300
  3. 880
  4. 3750
  5. 2750
  6. 250
  7. 450
  8. 300
  9. 900
  10. 480
  11. 550
  12. 360
  13. 720
  14. 600
  15. 210
  16. 3000
  17. 450
  18. 630
  19. 990
  20. 1080
  21. 1300
  22. 270
  23. 1980
  24. 1950
  25. 390
  26. 2210
  27. 120
  28. 210
  29. 1820
  30. 2200
  31. 420
  32. 950
  33. 1170
  34. 180
  35. 440
  36. 850
  37. 900
  38. 550
  39. 540
  40. 1170

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