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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 641 · 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 × 125 =
  2. 2.32 × 75 =
  3. 3.30 × 65 =
  4. 4.20 × 125 =
  5. 5.22 × 55 =
  6. 6.75 × 12 =
  7. 7.8 × 45 =
  8. 8.125 × 14 =
  9. 9.18 × 55 =
  10. 10.65 × 22 =
  11. 11.55 × 10 =
  12. 12.10 × 15 =
  13. 13.36 × 55 =
  14. 14.35 × 8 =
  15. 15.15 × 30 =
  16. 16.16 × 25 =
  17. 17.125 × 8 =
  18. 18.30 × 45 =
  19. 19.15 × 26 =
  20. 20.6 × 65 =
  21. 21.38 × 15 =
  22. 22.12 × 35 =
  23. 23.15 × 22 =
  24. 24.36 × 65 =
  25. 25.75 × 16 =
  26. 26.14 × 125 =
  27. 27.55 × 16 =
  28. 28.35 × 20 =
  29. 29.65 × 20 =
  30. 30.75 × 12 =
  31. 31.28 × 45 =
  32. 32.36 × 25 =
  33. 33.38 × 25 =
  34. 34.38 × 55 =
  35. 35.25 × 14 =
  36. 36.15 × 34 =
  37. 37.18 × 15 =
  38. 38.45 × 12 =
  39. 39.35 × 32 =
  40. 40.45 × 6 =

Answer key

  1. 2500
  2. 2400
  3. 1950
  4. 2500
  5. 1210
  6. 900
  7. 360
  8. 1750
  9. 990
  10. 1430
  11. 550
  12. 150
  13. 1980
  14. 280
  15. 450
  16. 400
  17. 1000
  18. 1350
  19. 390
  20. 390
  21. 570
  22. 420
  23. 330
  24. 2340
  25. 1200
  26. 1750
  27. 880
  28. 700
  29. 1300
  30. 900
  31. 1260
  32. 900
  33. 950
  34. 2090
  35. 350
  36. 510
  37. 270
  38. 540
  39. 1120
  40. 270

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