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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 63 · 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. 1.30 × 25 =
  2. 2.8 × 65 =
  3. 3.14 × 45 =
  4. 4.12 × 15 =
  5. 5.10 × 75 =
  6. 6.28 × 65 =
  7. 7.75 × 8 =
  8. 8.12 × 45 =
  9. 9.15 × 34 =
  10. 10.20 × 35 =
  11. 11.25 × 6 =
  12. 12.65 × 20 =
  13. 13.26 × 55 =
  14. 14.16 × 45 =
  15. 15.18 × 15 =
  16. 16.20 × 45 =
  17. 17.24 × 65 =
  18. 18.55 × 20 =
  19. 19.125 × 30 =
  20. 20.16 × 15 =
  21. 21.28 × 45 =
  22. 22.25 × 22 =
  23. 23.65 × 12 =
  24. 24.75 × 40 =
  25. 25.125 × 24 =
  26. 26.14 × 65 =
  27. 27.25 × 22 =
  28. 28.35 × 14 =
  29. 29.28 × 15 =
  30. 30.75 × 8 =
  31. 31.75 × 32 =
  32. 32.75 × 20 =
  33. 33.45 × 16 =
  34. 34.15 × 16 =
  35. 35.35 × 26 =
  36. 36.22 × 45 =
  37. 37.45 × 38 =
  38. 38.75 × 26 =
  39. 39.25 × 12 =
  40. 40.65 × 10 =

Answer key

  1. 750
  2. 520
  3. 630
  4. 180
  5. 750
  6. 1820
  7. 600
  8. 540
  9. 510
  10. 700
  11. 150
  12. 1300
  13. 1430
  14. 720
  15. 270
  16. 900
  17. 1560
  18. 1100
  19. 3750
  20. 240
  21. 1260
  22. 550
  23. 780
  24. 3000
  25. 3000
  26. 910
  27. 550
  28. 490
  29. 420
  30. 600
  31. 2400
  32. 1500
  33. 720
  34. 240
  35. 910
  36. 990
  37. 1710
  38. 1950
  39. 300
  40. 650

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