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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 107 · 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. 1.15 × 30 =
  2. 2.24 × 25 =
  3. 3.65 × 6 =
  4. 4.35 × 8 =
  5. 5.75 × 28 =
  6. 6.75 × 18 =
  7. 7.45 × 20 =
  8. 8.55 × 40 =
  9. 9.45 × 34 =
  10. 10.20 × 75 =
  11. 11.15 × 8 =
  12. 12.125 × 8 =
  13. 13.18 × 55 =
  14. 14.28 × 125 =
  15. 15.35 × 14 =
  16. 16.22 × 25 =
  17. 17.65 × 26 =
  18. 18.45 × 14 =
  19. 19.22 × 25 =
  20. 20.14 × 125 =
  21. 21.38 × 35 =
  22. 22.125 × 8 =
  23. 23.18 × 45 =
  24. 24.14 × 15 =
  25. 25.26 × 15 =
  26. 26.25 × 14 =
  27. 27.28 × 35 =
  28. 28.125 × 32 =
  29. 29.34 × 35 =
  30. 30.32 × 25 =
  31. 31.15 × 12 =
  32. 32.15 × 10 =
  33. 33.12 × 65 =
  34. 34.45 × 6 =
  35. 35.55 × 6 =
  36. 36.35 × 10 =
  37. 37.28 × 15 =
  38. 38.25 × 22 =
  39. 39.15 × 26 =
  40. 40.25 × 8 =

Answer key

  1. 450
  2. 600
  3. 390
  4. 280
  5. 2100
  6. 1350
  7. 900
  8. 2200
  9. 1530
  10. 1500
  11. 120
  12. 1000
  13. 990
  14. 3500
  15. 490
  16. 550
  17. 1690
  18. 630
  19. 550
  20. 1750
  21. 1330
  22. 1000
  23. 810
  24. 210
  25. 390
  26. 350
  27. 980
  28. 4000
  29. 1190
  30. 800
  31. 180
  32. 150
  33. 780
  34. 270
  35. 330
  36. 350
  37. 420
  38. 550
  39. 390
  40. 200

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