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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 967 · 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. 1.8 × 45 =
  2. 2.55 × 8 =
  3. 3.26 × 125 =
  4. 4.15 × 22 =
  5. 5.16 × 15 =
  6. 6.55 × 12 =
  7. 7.75 × 36 =
  8. 8.125 × 34 =
  9. 9.55 × 6 =
  10. 10.10 × 15 =
  11. 11.75 × 12 =
  12. 12.15 × 6 =
  13. 13.24 × 25 =
  14. 14.35 × 8 =
  15. 15.55 × 34 =
  16. 16.20 × 125 =
  17. 17.65 × 8 =
  18. 18.45 × 38 =
  19. 19.75 × 6 =
  20. 20.8 × 25 =
  21. 21.32 × 125 =
  22. 22.12 × 65 =
  23. 23.55 × 14 =
  24. 24.26 × 45 =
  25. 25.16 × 15 =
  26. 26.36 × 35 =
  27. 27.12 × 35 =
  28. 28.36 × 15 =
  29. 29.36 × 45 =
  30. 30.8 × 45 =
  31. 31.65 × 16 =
  32. 32.25 × 40 =
  33. 33.6 × 75 =
  34. 34.65 × 12 =
  35. 35.125 × 26 =
  36. 36.18 × 55 =
  37. 37.16 × 15 =
  38. 38.75 × 30 =
  39. 39.18 × 15 =
  40. 40.25 × 18 =

Answer key

  1. 360
  2. 440
  3. 3250
  4. 330
  5. 240
  6. 660
  7. 2700
  8. 4250
  9. 330
  10. 150
  11. 900
  12. 90
  13. 600
  14. 280
  15. 1870
  16. 2500
  17. 520
  18. 1710
  19. 450
  20. 200
  21. 4000
  22. 780
  23. 770
  24. 1170
  25. 240
  26. 1260
  27. 420
  28. 540
  29. 1620
  30. 360
  31. 1040
  32. 1000
  33. 450
  34. 780
  35. 3250
  36. 990
  37. 240
  38. 2250
  39. 270
  40. 450

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