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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 881 · 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. 1.25 × 12 =
  2. 2.30 × 65 =
  3. 3.75 × 6 =
  4. 4.65 × 24 =
  5. 5.35 × 20 =
  6. 6.75 × 10 =
  7. 7.125 × 14 =
  8. 8.75 × 16 =
  9. 9.25 × 18 =
  10. 10.16 × 15 =
  11. 11.14 × 55 =
  12. 12.14 × 75 =
  13. 13.45 × 14 =
  14. 14.15 × 26 =
  15. 15.35 × 36 =
  16. 16.65 × 34 =
  17. 17.45 × 6 =
  18. 18.65 × 10 =
  19. 19.18 × 25 =
  20. 20.45 × 8 =
  21. 21.38 × 35 =
  22. 22.15 × 40 =
  23. 23.6 × 35 =
  24. 24.30 × 75 =
  25. 25.38 × 45 =
  26. 26.6 × 15 =
  27. 27.25 × 22 =
  28. 28.75 × 40 =
  29. 29.20 × 15 =
  30. 30.28 × 35 =
  31. 31.15 × 20 =
  32. 32.55 × 24 =
  33. 33.75 × 16 =
  34. 34.45 × 12 =
  35. 35.8 × 75 =
  36. 36.30 × 55 =
  37. 37.32 × 65 =
  38. 38.34 × 35 =
  39. 39.65 × 12 =
  40. 40.75 × 14 =

Answer key

  1. 300
  2. 1950
  3. 450
  4. 1560
  5. 700
  6. 750
  7. 1750
  8. 1200
  9. 450
  10. 240
  11. 770
  12. 1050
  13. 630
  14. 390
  15. 1260
  16. 2210
  17. 270
  18. 650
  19. 450
  20. 360
  21. 1330
  22. 600
  23. 210
  24. 2250
  25. 1710
  26. 90
  27. 550
  28. 3000
  29. 300
  30. 980
  31. 300
  32. 1320
  33. 1200
  34. 540
  35. 600
  36. 1650
  37. 2080
  38. 1190
  39. 780
  40. 1050

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