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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 668 · 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. 1.35 × 26 =
  2. 2.8 × 15 =
  3. 3.15 × 26 =
  4. 4.15 × 8 =
  5. 5.22 × 75 =
  6. 6.35 × 20 =
  7. 7.32 × 15 =
  8. 8.20 × 125 =
  9. 9.15 × 28 =
  10. 10.35 × 24 =
  11. 11.30 × 15 =
  12. 12.35 × 36 =
  13. 13.65 × 12 =
  14. 14.75 × 16 =
  15. 15.40 × 55 =
  16. 16.35 × 34 =
  17. 17.125 × 18 =
  18. 18.32 × 55 =
  19. 19.25 × 6 =
  20. 20.45 × 8 =
  21. 21.32 × 45 =
  22. 22.28 × 125 =
  23. 23.40 × 65 =
  24. 24.10 × 15 =
  25. 25.22 × 15 =
  26. 26.24 × 35 =
  27. 27.6 × 55 =
  28. 28.32 × 45 =
  29. 29.75 × 40 =
  30. 30.75 × 24 =
  31. 31.45 × 10 =
  32. 32.45 × 16 =
  33. 33.38 × 15 =
  34. 34.65 × 8 =
  35. 35.16 × 15 =
  36. 36.25 × 36 =
  37. 37.35 × 24 =
  38. 38.125 × 12 =
  39. 39.24 × 55 =
  40. 40.55 × 18 =

Answer key

  1. 910
  2. 120
  3. 390
  4. 120
  5. 1650
  6. 700
  7. 480
  8. 2500
  9. 420
  10. 840
  11. 450
  12. 1260
  13. 780
  14. 1200
  15. 2200
  16. 1190
  17. 2250
  18. 1760
  19. 150
  20. 360
  21. 1440
  22. 3500
  23. 2600
  24. 150
  25. 330
  26. 840
  27. 330
  28. 1440
  29. 3000
  30. 1800
  31. 450
  32. 720
  33. 570
  34. 520
  35. 240
  36. 900
  37. 840
  38. 1500
  39. 1320
  40. 990

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