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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 161 · 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. 1.34 × 75 =
  2. 2.35 × 30 =
  3. 3.125 × 40 =
  4. 4.55 × 16 =
  5. 5.35 × 20 =
  6. 6.25 × 26 =
  7. 7.26 × 55 =
  8. 8.75 × 8 =
  9. 9.45 × 8 =
  10. 10.45 × 10 =
  11. 11.65 × 12 =
  12. 12.15 × 18 =
  13. 13.32 × 45 =
  14. 14.25 × 38 =
  15. 15.35 × 34 =
  16. 16.20 × 55 =
  17. 17.10 × 35 =
  18. 18.14 × 75 =
  19. 19.55 × 22 =
  20. 20.125 × 6 =
  21. 21.55 × 20 =
  22. 22.6 × 65 =
  23. 23.45 × 40 =
  24. 24.45 × 18 =
  25. 25.45 × 30 =
  26. 26.8 × 125 =
  27. 27.20 × 55 =
  28. 28.12 × 125 =
  29. 29.25 × 24 =
  30. 30.55 × 10 =
  31. 31.6 × 25 =
  32. 32.75 × 16 =
  33. 33.15 × 16 =
  34. 34.75 × 14 =
  35. 35.75 × 14 =
  36. 36.45 × 34 =
  37. 37.45 × 26 =
  38. 38.22 × 15 =
  39. 39.28 × 15 =
  40. 40.55 × 30 =

Answer key

  1. 2550
  2. 1050
  3. 5000
  4. 880
  5. 700
  6. 650
  7. 1430
  8. 600
  9. 360
  10. 450
  11. 780
  12. 270
  13. 1440
  14. 950
  15. 1190
  16. 1100
  17. 350
  18. 1050
  19. 1210
  20. 750
  21. 1100
  22. 390
  23. 1800
  24. 810
  25. 1350
  26. 1000
  27. 1100
  28. 1500
  29. 600
  30. 550
  31. 150
  32. 1200
  33. 240
  34. 1050
  35. 1050
  36. 1530
  37. 1170
  38. 330
  39. 420
  40. 1650

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