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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 424 · 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 × 15 =
  2. 2.25 × 20 =
  3. 3.45 × 28 =
  4. 4.26 × 55 =
  5. 5.14 × 65 =
  6. 6.75 × 14 =
  7. 7.14 × 35 =
  8. 8.6 × 35 =
  9. 9.32 × 15 =
  10. 10.45 × 16 =
  11. 11.125 × 40 =
  12. 12.65 × 40 =
  13. 13.75 × 30 =
  14. 14.28 × 15 =
  15. 15.125 × 38 =
  16. 16.32 × 15 =
  17. 17.6 × 35 =
  18. 18.65 × 18 =
  19. 19.45 × 20 =
  20. 20.45 × 40 =
  21. 21.18 × 55 =
  22. 22.15 × 14 =
  23. 23.40 × 125 =
  24. 24.65 × 6 =
  25. 25.38 × 125 =
  26. 26.32 × 45 =
  27. 27.125 × 10 =
  28. 28.15 × 18 =
  29. 29.15 × 32 =
  30. 30.16 × 75 =
  31. 31.38 × 15 =
  32. 32.30 × 15 =
  33. 33.15 × 38 =
  34. 34.26 × 15 =
  35. 35.16 × 35 =
  36. 36.55 × 18 =
  37. 37.8 × 65 =
  38. 38.26 × 125 =
  39. 39.6 × 15 =
  40. 40.25 × 40 =

Answer key

  1. 390
  2. 500
  3. 1260
  4. 1430
  5. 910
  6. 1050
  7. 490
  8. 210
  9. 480
  10. 720
  11. 5000
  12. 2600
  13. 2250
  14. 420
  15. 4750
  16. 480
  17. 210
  18. 1170
  19. 900
  20. 1800
  21. 990
  22. 210
  23. 5000
  24. 390
  25. 4750
  26. 1440
  27. 1250
  28. 270
  29. 480
  30. 1200
  31. 570
  32. 450
  33. 570
  34. 390
  35. 560
  36. 990
  37. 520
  38. 3250
  39. 90
  40. 1000

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