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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 858 · 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 × 34 =
  2. 2.35 × 8 =
  3. 3.35 × 10 =
  4. 4.22 × 55 =
  5. 5.40 × 45 =
  6. 6.26 × 45 =
  7. 7.45 × 14 =
  8. 8.65 × 20 =
  9. 9.10 × 55 =
  10. 10.24 × 15 =
  11. 11.65 × 16 =
  12. 12.75 × 16 =
  13. 13.28 × 75 =
  14. 14.35 × 20 =
  15. 15.8 × 35 =
  16. 16.55 × 20 =
  17. 17.30 × 75 =
  18. 18.40 × 45 =
  19. 19.125 × 38 =
  20. 20.38 × 55 =
  21. 21.22 × 75 =
  22. 22.28 × 65 =
  23. 23.65 × 32 =
  24. 24.8 × 75 =
  25. 25.8 × 45 =
  26. 26.25 × 18 =
  27. 27.15 × 28 =
  28. 28.65 × 36 =
  29. 29.65 × 8 =
  30. 30.65 × 26 =
  31. 31.75 × 22 =
  32. 32.6 × 15 =
  33. 33.55 × 8 =
  34. 34.35 × 20 =
  35. 35.30 × 25 =
  36. 36.22 × 65 =
  37. 37.15 × 6 =
  38. 38.25 × 22 =
  39. 39.15 × 8 =
  40. 40.8 × 25 =

Answer key

  1. 850
  2. 280
  3. 350
  4. 1210
  5. 1800
  6. 1170
  7. 630
  8. 1300
  9. 550
  10. 360
  11. 1040
  12. 1200
  13. 2100
  14. 700
  15. 280
  16. 1100
  17. 2250
  18. 1800
  19. 4750
  20. 2090
  21. 1650
  22. 1820
  23. 2080
  24. 600
  25. 360
  26. 450
  27. 420
  28. 2340
  29. 520
  30. 1690
  31. 1650
  32. 90
  33. 440
  34. 700
  35. 750
  36. 1430
  37. 90
  38. 550
  39. 120
  40. 200

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