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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 965 · 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. 1.45 × 28 =
  2. 2.65 × 14 =
  3. 3.22 × 45 =
  4. 4.55 × 24 =
  5. 5.26 × 25 =
  6. 6.14 × 75 =
  7. 7.45 × 40 =
  8. 8.35 × 10 =
  9. 9.28 × 65 =
  10. 10.16 × 25 =
  11. 11.35 × 6 =
  12. 12.125 × 8 =
  13. 13.55 × 10 =
  14. 14.75 × 24 =
  15. 15.20 × 25 =
  16. 16.28 × 55 =
  17. 17.30 × 15 =
  18. 18.36 × 25 =
  19. 19.40 × 15 =
  20. 20.65 × 12 =
  21. 21.18 × 15 =
  22. 22.20 × 75 =
  23. 23.38 × 35 =
  24. 24.14 × 45 =
  25. 25.36 × 65 =
  26. 26.14 × 65 =
  27. 27.65 × 38 =
  28. 28.45 × 32 =
  29. 29.75 × 20 =
  30. 30.24 × 75 =
  31. 31.8 × 75 =
  32. 32.75 × 14 =
  33. 33.14 × 75 =
  34. 34.8 × 15 =
  35. 35.36 × 35 =
  36. 36.125 × 34 =
  37. 37.20 × 15 =
  38. 38.35 × 20 =
  39. 39.28 × 15 =
  40. 40.30 × 75 =

Answer key

  1. 1260
  2. 910
  3. 990
  4. 1320
  5. 650
  6. 1050
  7. 1800
  8. 350
  9. 1820
  10. 400
  11. 210
  12. 1000
  13. 550
  14. 1800
  15. 500
  16. 1540
  17. 450
  18. 900
  19. 600
  20. 780
  21. 270
  22. 1500
  23. 1330
  24. 630
  25. 2340
  26. 910
  27. 2470
  28. 1440
  29. 1500
  30. 1800
  31. 600
  32. 1050
  33. 1050
  34. 120
  35. 1260
  36. 4250
  37. 300
  38. 700
  39. 420
  40. 2250

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