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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 964 · 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. 1.65 × 8 =
  2. 2.10 × 35 =
  3. 3.65 × 26 =
  4. 4.55 × 18 =
  5. 5.65 × 6 =
  6. 6.65 × 16 =
  7. 7.34 × 25 =
  8. 8.15 × 38 =
  9. 9.125 × 12 =
  10. 10.14 × 125 =
  11. 11.32 × 55 =
  12. 12.65 × 6 =
  13. 13.34 × 15 =
  14. 14.35 × 6 =
  15. 15.35 × 10 =
  16. 16.65 × 8 =
  17. 17.40 × 15 =
  18. 18.45 × 22 =
  19. 19.14 × 75 =
  20. 20.15 × 12 =
  21. 21.26 × 75 =
  22. 22.16 × 65 =
  23. 23.125 × 28 =
  24. 24.25 × 30 =
  25. 25.125 × 26 =
  26. 26.10 × 45 =
  27. 27.14 × 75 =
  28. 28.26 × 25 =
  29. 29.35 × 6 =
  30. 30.125 × 26 =
  31. 31.8 × 65 =
  32. 32.35 × 24 =
  33. 33.8 × 35 =
  34. 34.20 × 35 =
  35. 35.20 × 35 =
  36. 36.8 × 25 =
  37. 37.20 × 15 =
  38. 38.8 × 25 =
  39. 39.45 × 8 =
  40. 40.40 × 35 =

Answer key

  1. 520
  2. 350
  3. 1690
  4. 990
  5. 390
  6. 1040
  7. 850
  8. 570
  9. 1500
  10. 1750
  11. 1760
  12. 390
  13. 510
  14. 210
  15. 350
  16. 520
  17. 600
  18. 990
  19. 1050
  20. 180
  21. 1950
  22. 1040
  23. 3500
  24. 750
  25. 3250
  26. 450
  27. 1050
  28. 650
  29. 210
  30. 3250
  31. 520
  32. 840
  33. 280
  34. 700
  35. 700
  36. 200
  37. 300
  38. 200
  39. 360
  40. 1400

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