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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 664 · 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 × 75 =
  2. 2.14 × 15 =
  3. 3.30 × 25 =
  4. 4.35 × 14 =
  5. 5.15 × 8 =
  6. 6.28 × 75 =
  7. 7.15 × 10 =
  8. 8.25 × 8 =
  9. 9.75 × 6 =
  10. 10.14 × 35 =
  11. 11.12 × 65 =
  12. 12.18 × 15 =
  13. 13.6 × 25 =
  14. 14.26 × 25 =
  15. 15.20 × 35 =
  16. 16.125 × 6 =
  17. 17.18 × 35 =
  18. 18.55 × 34 =
  19. 19.12 × 75 =
  20. 20.6 × 35 =
  21. 21.16 × 15 =
  22. 22.30 × 125 =
  23. 23.26 × 45 =
  24. 24.15 × 12 =
  25. 25.10 × 55 =
  26. 26.125 × 26 =
  27. 27.75 × 28 =
  28. 28.25 × 36 =
  29. 29.24 × 25 =
  30. 30.15 × 40 =
  31. 31.35 × 26 =
  32. 32.24 × 75 =
  33. 33.35 × 8 =
  34. 34.10 × 15 =
  35. 35.36 × 65 =
  36. 36.35 × 12 =
  37. 37.35 × 26 =
  38. 38.35 × 12 =
  39. 39.24 × 35 =
  40. 40.14 × 55 =

Answer key

  1. 1050
  2. 210
  3. 750
  4. 490
  5. 120
  6. 2100
  7. 150
  8. 200
  9. 450
  10. 490
  11. 780
  12. 270
  13. 150
  14. 650
  15. 700
  16. 750
  17. 630
  18. 1870
  19. 900
  20. 210
  21. 240
  22. 3750
  23. 1170
  24. 180
  25. 550
  26. 3250
  27. 2100
  28. 900
  29. 600
  30. 600
  31. 910
  32. 1800
  33. 280
  34. 150
  35. 2340
  36. 420
  37. 910
  38. 420
  39. 840
  40. 770

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