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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 160 · 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. 1.55 × 12 =
  2. 2.45 × 18 =
  3. 3.38 × 25 =
  4. 4.25 × 40 =
  5. 5.75 × 12 =
  6. 6.26 × 75 =
  7. 7.34 × 45 =
  8. 8.75 × 38 =
  9. 9.15 × 34 =
  10. 10.16 × 25 =
  11. 11.75 × 6 =
  12. 12.35 × 34 =
  13. 13.36 × 45 =
  14. 14.15 × 16 =
  15. 15.32 × 45 =
  16. 16.35 × 18 =
  17. 17.55 × 6 =
  18. 18.15 × 8 =
  19. 19.55 × 40 =
  20. 20.12 × 35 =
  21. 21.20 × 65 =
  22. 22.25 × 36 =
  23. 23.75 × 8 =
  24. 24.125 × 30 =
  25. 25.34 × 75 =
  26. 26.40 × 125 =
  27. 27.26 × 75 =
  28. 28.55 × 36 =
  29. 29.12 × 15 =
  30. 30.36 × 65 =
  31. 31.32 × 25 =
  32. 32.28 × 75 =
  33. 33.6 × 15 =
  34. 34.15 × 40 =
  35. 35.25 × 38 =
  36. 36.35 × 32 =
  37. 37.35 × 24 =
  38. 38.16 × 25 =
  39. 39.75 × 16 =
  40. 40.26 × 45 =

Answer key

  1. 660
  2. 810
  3. 950
  4. 1000
  5. 900
  6. 1950
  7. 1530
  8. 2850
  9. 510
  10. 400
  11. 450
  12. 1190
  13. 1620
  14. 240
  15. 1440
  16. 630
  17. 330
  18. 120
  19. 2200
  20. 420
  21. 1300
  22. 900
  23. 600
  24. 3750
  25. 2550
  26. 5000
  27. 1950
  28. 1980
  29. 180
  30. 2340
  31. 800
  32. 2100
  33. 90
  34. 600
  35. 950
  36. 1120
  37. 840
  38. 400
  39. 1200
  40. 1170

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