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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 786 · 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. 1.8 × 45 =
  2. 2.34 × 45 =
  3. 3.14 × 55 =
  4. 4.75 × 22 =
  5. 5.25 × 14 =
  6. 6.6 × 125 =
  7. 7.65 × 26 =
  8. 8.65 × 8 =
  9. 9.6 × 55 =
  10. 10.8 × 75 =
  11. 11.10 × 45 =
  12. 12.34 × 45 =
  13. 13.25 × 34 =
  14. 14.15 × 30 =
  15. 15.15 × 24 =
  16. 16.125 × 6 =
  17. 17.45 × 38 =
  18. 18.55 × 24 =
  19. 19.65 × 20 =
  20. 20.55 × 6 =
  21. 21.125 × 30 =
  22. 22.65 × 8 =
  23. 23.15 × 10 =
  24. 24.125 × 20 =
  25. 25.26 × 25 =
  26. 26.55 × 22 =
  27. 27.35 × 36 =
  28. 28.55 × 8 =
  29. 29.65 × 18 =
  30. 30.6 × 125 =
  31. 31.16 × 55 =
  32. 32.10 × 15 =
  33. 33.15 × 24 =
  34. 34.6 × 25 =
  35. 35.75 × 6 =
  36. 36.34 × 65 =
  37. 37.25 × 40 =
  38. 38.28 × 65 =
  39. 39.36 × 75 =
  40. 40.6 × 35 =

Answer key

  1. 360
  2. 1530
  3. 770
  4. 1650
  5. 350
  6. 750
  7. 1690
  8. 520
  9. 330
  10. 600
  11. 450
  12. 1530
  13. 850
  14. 450
  15. 360
  16. 750
  17. 1710
  18. 1320
  19. 1300
  20. 330
  21. 3750
  22. 520
  23. 150
  24. 2500
  25. 650
  26. 1210
  27. 1260
  28. 440
  29. 1170
  30. 750
  31. 880
  32. 150
  33. 360
  34. 150
  35. 450
  36. 2210
  37. 1000
  38. 1820
  39. 2700
  40. 210

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