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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 254 · 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 × 18 =
  2. 2.40 × 75 =
  3. 3.38 × 75 =
  4. 4.20 × 45 =
  5. 5.15 × 12 =
  6. 6.8 × 15 =
  7. 7.125 × 38 =
  8. 8.16 × 15 =
  9. 9.65 × 14 =
  10. 10.34 × 65 =
  11. 11.14 × 65 =
  12. 12.25 × 36 =
  13. 13.25 × 10 =
  14. 14.28 × 125 =
  15. 15.45 × 6 =
  16. 16.30 × 15 =
  17. 17.15 × 16 =
  18. 18.10 × 15 =
  19. 19.45 × 36 =
  20. 20.65 × 18 =
  21. 21.125 × 36 =
  22. 22.15 × 12 =
  23. 23.65 × 18 =
  24. 24.15 × 34 =
  25. 25.36 × 35 =
  26. 26.45 × 28 =
  27. 27.15 × 18 =
  28. 28.40 × 15 =
  29. 29.12 × 75 =
  30. 30.30 × 15 =
  31. 31.12 × 45 =
  32. 32.65 × 40 =
  33. 33.75 × 12 =
  34. 34.15 × 16 =
  35. 35.55 × 40 =
  36. 36.25 × 18 =
  37. 37.65 × 28 =
  38. 38.8 × 25 =
  39. 39.28 × 45 =
  40. 40.20 × 25 =

Answer key

  1. 450
  2. 3000
  3. 2850
  4. 900
  5. 180
  6. 120
  7. 4750
  8. 240
  9. 910
  10. 2210
  11. 910
  12. 900
  13. 250
  14. 3500
  15. 270
  16. 450
  17. 240
  18. 150
  19. 1620
  20. 1170
  21. 4500
  22. 180
  23. 1170
  24. 510
  25. 1260
  26. 1260
  27. 270
  28. 600
  29. 900
  30. 450
  31. 540
  32. 2600
  33. 900
  34. 240
  35. 2200
  36. 450
  37. 1820
  38. 200
  39. 1260
  40. 500

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