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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 303 · 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. 1.125 × 20 =
  2. 2.125 × 18 =
  3. 3.25 × 14 =
  4. 4.28 × 45 =
  5. 5.15 × 6 =
  6. 6.22 × 45 =
  7. 7.15 × 38 =
  8. 8.125 × 34 =
  9. 9.14 × 75 =
  10. 10.26 × 45 =
  11. 11.35 × 10 =
  12. 12.65 × 38 =
  13. 13.15 × 10 =
  14. 14.25 × 32 =
  15. 15.55 × 14 =
  16. 16.22 × 75 =
  17. 17.14 × 75 =
  18. 18.38 × 25 =
  19. 19.125 × 10 =
  20. 20.8 × 75 =
  21. 21.14 × 35 =
  22. 22.35 × 20 =
  23. 23.16 × 125 =
  24. 24.38 × 65 =
  25. 25.45 × 30 =
  26. 26.75 × 38 =
  27. 27.40 × 125 =
  28. 28.15 × 34 =
  29. 29.30 × 15 =
  30. 30.36 × 25 =
  31. 31.75 × 32 =
  32. 32.125 × 18 =
  33. 33.55 × 14 =
  34. 34.14 × 75 =
  35. 35.30 × 75 =
  36. 36.65 × 22 =
  37. 37.45 × 22 =
  38. 38.10 × 65 =
  39. 39.125 × 20 =
  40. 40.40 × 35 =

Answer key

  1. 2500
  2. 2250
  3. 350
  4. 1260
  5. 90
  6. 990
  7. 570
  8. 4250
  9. 1050
  10. 1170
  11. 350
  12. 2470
  13. 150
  14. 800
  15. 770
  16. 1650
  17. 1050
  18. 950
  19. 1250
  20. 600
  21. 490
  22. 700
  23. 2000
  24. 2470
  25. 1350
  26. 2850
  27. 5000
  28. 510
  29. 450
  30. 900
  31. 2400
  32. 2250
  33. 770
  34. 1050
  35. 2250
  36. 1430
  37. 990
  38. 650
  39. 2500
  40. 1400

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