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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 258 · 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. 1.14 × 25 =
  2. 2.55 × 16 =
  3. 3.16 × 35 =
  4. 4.36 × 25 =
  5. 5.35 × 28 =
  6. 6.75 × 30 =
  7. 7.6 × 75 =
  8. 8.30 × 15 =
  9. 9.16 × 45 =
  10. 10.22 × 15 =
  11. 11.34 × 15 =
  12. 12.35 × 8 =
  13. 13.45 × 20 =
  14. 14.15 × 32 =
  15. 15.22 × 15 =
  16. 16.25 × 34 =
  17. 17.34 × 35 =
  18. 18.22 × 125 =
  19. 19.10 × 55 =
  20. 20.15 × 12 =
  21. 21.40 × 25 =
  22. 22.35 × 22 =
  23. 23.65 × 12 =
  24. 24.65 × 20 =
  25. 25.15 × 20 =
  26. 26.15 × 8 =
  27. 27.28 × 45 =
  28. 28.36 × 15 =
  29. 29.8 × 35 =
  30. 30.10 × 65 =
  31. 31.75 × 36 =
  32. 32.8 × 25 =
  33. 33.24 × 75 =
  34. 34.22 × 45 =
  35. 35.38 × 45 =
  36. 36.65 × 38 =
  37. 37.125 × 36 =
  38. 38.16 × 65 =
  39. 39.12 × 25 =
  40. 40.35 × 36 =

Answer key

  1. 350
  2. 880
  3. 560
  4. 900
  5. 980
  6. 2250
  7. 450
  8. 450
  9. 720
  10. 330
  11. 510
  12. 280
  13. 900
  14. 480
  15. 330
  16. 850
  17. 1190
  18. 2750
  19. 550
  20. 180
  21. 1000
  22. 770
  23. 780
  24. 1300
  25. 300
  26. 120
  27. 1260
  28. 540
  29. 280
  30. 650
  31. 2700
  32. 200
  33. 1800
  34. 990
  35. 1710
  36. 2470
  37. 4500
  38. 1040
  39. 300
  40. 1260

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