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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 936 · 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. 1.24 × 45 =
  2. 2.35 × 12 =
  3. 3.25 × 16 =
  4. 4.25 × 18 =
  5. 5.35 × 6 =
  6. 6.35 × 14 =
  7. 7.125 × 22 =
  8. 8.36 × 25 =
  9. 9.24 × 75 =
  10. 10.10 × 45 =
  11. 11.55 × 36 =
  12. 12.24 × 15 =
  13. 13.35 × 14 =
  14. 14.125 × 38 =
  15. 15.45 × 30 =
  16. 16.55 × 20 =
  17. 17.10 × 15 =
  18. 18.75 × 26 =
  19. 19.32 × 25 =
  20. 20.38 × 35 =
  21. 21.125 × 8 =
  22. 22.125 × 6 =
  23. 23.55 × 28 =
  24. 24.38 × 15 =
  25. 25.12 × 45 =
  26. 26.26 × 35 =
  27. 27.125 × 32 =
  28. 28.65 × 8 =
  29. 29.14 × 125 =
  30. 30.65 × 14 =
  31. 31.15 × 14 =
  32. 32.26 × 25 =
  33. 33.25 × 22 =
  34. 34.125 × 10 =
  35. 35.25 × 24 =
  36. 36.125 × 14 =
  37. 37.75 × 8 =
  38. 38.30 × 65 =
  39. 39.14 × 35 =
  40. 40.28 × 45 =

Answer key

  1. 1080
  2. 420
  3. 400
  4. 450
  5. 210
  6. 490
  7. 2750
  8. 900
  9. 1800
  10. 450
  11. 1980
  12. 360
  13. 490
  14. 4750
  15. 1350
  16. 1100
  17. 150
  18. 1950
  19. 800
  20. 1330
  21. 1000
  22. 750
  23. 1540
  24. 570
  25. 540
  26. 910
  27. 4000
  28. 520
  29. 1750
  30. 910
  31. 210
  32. 650
  33. 550
  34. 1250
  35. 600
  36. 1750
  37. 600
  38. 1950
  39. 490
  40. 1260

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