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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 685 · 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. 1.26 × 25 =
  2. 2.32 × 15 =
  3. 3.14 × 125 =
  4. 4.45 × 10 =
  5. 5.25 × 10 =
  6. 6.24 × 55 =
  7. 7.32 × 45 =
  8. 8.8 × 55 =
  9. 9.10 × 25 =
  10. 10.34 × 15 =
  11. 11.12 × 125 =
  12. 12.32 × 45 =
  13. 13.65 × 40 =
  14. 14.15 × 10 =
  15. 15.125 × 18 =
  16. 16.35 × 34 =
  17. 17.75 × 30 =
  18. 18.14 × 15 =
  19. 19.75 × 38 =
  20. 20.45 × 18 =
  21. 21.55 × 26 =
  22. 22.15 × 26 =
  23. 23.75 × 38 =
  24. 24.16 × 125 =
  25. 25.22 × 25 =
  26. 26.15 × 40 =
  27. 27.30 × 45 =
  28. 28.55 × 30 =
  29. 29.32 × 75 =
  30. 30.65 × 24 =
  31. 31.15 × 22 =
  32. 32.14 × 35 =
  33. 33.18 × 55 =
  34. 34.35 × 14 =
  35. 35.125 × 30 =
  36. 36.125 × 34 =
  37. 37.45 × 18 =
  38. 38.55 × 24 =
  39. 39.15 × 8 =
  40. 40.16 × 45 =

Answer key

  1. 650
  2. 480
  3. 1750
  4. 450
  5. 250
  6. 1320
  7. 1440
  8. 440
  9. 250
  10. 510
  11. 1500
  12. 1440
  13. 2600
  14. 150
  15. 2250
  16. 1190
  17. 2250
  18. 210
  19. 2850
  20. 810
  21. 1430
  22. 390
  23. 2850
  24. 2000
  25. 550
  26. 600
  27. 1350
  28. 1650
  29. 2400
  30. 1560
  31. 330
  32. 490
  33. 990
  34. 490
  35. 3750
  36. 4250
  37. 810
  38. 1320
  39. 120
  40. 720

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