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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 838 · 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 × 24 =
  2. 2.55 × 12 =
  3. 3.10 × 15 =
  4. 4.10 × 75 =
  5. 5.35 × 6 =
  6. 6.55 × 8 =
  7. 7.25 × 16 =
  8. 8.36 × 75 =
  9. 9.45 × 22 =
  10. 10.12 × 25 =
  11. 11.45 × 40 =
  12. 12.35 × 10 =
  13. 13.25 × 28 =
  14. 14.45 × 18 =
  15. 15.125 × 22 =
  16. 16.38 × 45 =
  17. 17.25 × 22 =
  18. 18.24 × 65 =
  19. 19.75 × 38 =
  20. 20.14 × 45 =
  21. 21.28 × 75 =
  22. 22.16 × 15 =
  23. 23.6 × 65 =
  24. 24.28 × 25 =
  25. 25.14 × 55 =
  26. 26.12 × 65 =
  27. 27.45 × 10 =
  28. 28.55 × 20 =
  29. 29.45 × 30 =
  30. 30.38 × 75 =
  31. 31.125 × 18 =
  32. 32.6 × 45 =
  33. 33.38 × 35 =
  34. 34.14 × 45 =
  35. 35.25 × 26 =
  36. 36.20 × 15 =
  37. 37.32 × 35 =
  38. 38.32 × 75 =
  39. 39.45 × 32 =
  40. 40.8 × 75 =

Answer key

  1. 1560
  2. 660
  3. 150
  4. 750
  5. 210
  6. 440
  7. 400
  8. 2700
  9. 990
  10. 300
  11. 1800
  12. 350
  13. 700
  14. 810
  15. 2750
  16. 1710
  17. 550
  18. 1560
  19. 2850
  20. 630
  21. 2100
  22. 240
  23. 390
  24. 700
  25. 770
  26. 780
  27. 450
  28. 1100
  29. 1350
  30. 2850
  31. 2250
  32. 270
  33. 1330
  34. 630
  35. 650
  36. 300
  37. 1120
  38. 2400
  39. 1440
  40. 600

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