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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 291 · 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. 1.20 × 35 =
  2. 2.65 × 10 =
  3. 3.55 × 34 =
  4. 4.38 × 55 =
  5. 5.26 × 75 =
  6. 6.28 × 15 =
  7. 7.15 × 8 =
  8. 8.125 × 12 =
  9. 9.55 × 14 =
  10. 10.22 × 15 =
  11. 11.35 × 8 =
  12. 12.18 × 75 =
  13. 13.15 × 24 =
  14. 14.15 × 14 =
  15. 15.32 × 125 =
  16. 16.35 × 22 =
  17. 17.10 × 15 =
  18. 18.55 × 22 =
  19. 19.34 × 25 =
  20. 20.32 × 125 =
  21. 21.75 × 30 =
  22. 22.10 × 15 =
  23. 23.6 × 75 =
  24. 24.28 × 55 =
  25. 25.125 × 18 =
  26. 26.125 × 12 =
  27. 27.32 × 25 =
  28. 28.8 × 25 =
  29. 29.14 × 45 =
  30. 30.35 × 20 =
  31. 31.18 × 35 =
  32. 32.16 × 15 =
  33. 33.10 × 55 =
  34. 34.24 × 15 =
  35. 35.38 × 15 =
  36. 36.28 × 55 =
  37. 37.38 × 35 =
  38. 38.25 × 16 =
  39. 39.35 × 12 =
  40. 40.15 × 38 =

Answer key

  1. 700
  2. 650
  3. 1870
  4. 2090
  5. 1950
  6. 420
  7. 120
  8. 1500
  9. 770
  10. 330
  11. 280
  12. 1350
  13. 360
  14. 210
  15. 4000
  16. 770
  17. 150
  18. 1210
  19. 850
  20. 4000
  21. 2250
  22. 150
  23. 450
  24. 1540
  25. 2250
  26. 1500
  27. 800
  28. 200
  29. 630
  30. 700
  31. 630
  32. 240
  33. 550
  34. 360
  35. 570
  36. 1540
  37. 1330
  38. 400
  39. 420
  40. 570

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