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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 388 · 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. 1.125 × 8 =
  2. 2.35 × 8 =
  3. 3.28 × 45 =
  4. 4.35 × 36 =
  5. 5.8 × 35 =
  6. 6.25 × 6 =
  7. 7.28 × 15 =
  8. 8.6 × 55 =
  9. 9.34 × 65 =
  10. 10.16 × 75 =
  11. 11.15 × 26 =
  12. 12.15 × 18 =
  13. 13.15 × 30 =
  14. 14.75 × 6 =
  15. 15.14 × 35 =
  16. 16.55 × 40 =
  17. 17.14 × 125 =
  18. 18.45 × 6 =
  19. 19.65 × 16 =
  20. 20.25 × 26 =
  21. 21.40 × 25 =
  22. 22.25 × 6 =
  23. 23.35 × 32 =
  24. 24.25 × 24 =
  25. 25.35 × 20 =
  26. 26.36 × 65 =
  27. 27.14 × 35 =
  28. 28.24 × 55 =
  29. 29.55 × 40 =
  30. 30.125 × 38 =
  31. 31.10 × 65 =
  32. 32.35 × 28 =
  33. 33.28 × 45 =
  34. 34.35 × 30 =
  35. 35.25 × 12 =
  36. 36.14 × 55 =
  37. 37.6 × 25 =
  38. 38.22 × 125 =
  39. 39.25 × 24 =
  40. 40.8 × 25 =

Answer key

  1. 1000
  2. 280
  3. 1260
  4. 1260
  5. 280
  6. 150
  7. 420
  8. 330
  9. 2210
  10. 1200
  11. 390
  12. 270
  13. 450
  14. 450
  15. 490
  16. 2200
  17. 1750
  18. 270
  19. 1040
  20. 650
  21. 1000
  22. 150
  23. 1120
  24. 600
  25. 700
  26. 2340
  27. 490
  28. 1320
  29. 2200
  30. 4750
  31. 650
  32. 980
  33. 1260
  34. 1050
  35. 300
  36. 770
  37. 150
  38. 2750
  39. 600
  40. 200

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