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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 449 · 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. 1.14 × 35 =
  2. 2.35 × 32 =
  3. 3.36 × 55 =
  4. 4.12 × 15 =
  5. 5.16 × 35 =
  6. 6.14 × 75 =
  7. 7.12 × 55 =
  8. 8.15 × 14 =
  9. 9.28 × 45 =
  10. 10.25 × 38 =
  11. 11.35 × 32 =
  12. 12.125 × 30 =
  13. 13.10 × 65 =
  14. 14.24 × 15 =
  15. 15.75 × 12 =
  16. 16.75 × 6 =
  17. 17.25 × 10 =
  18. 18.15 × 30 =
  19. 19.14 × 15 =
  20. 20.38 × 75 =
  21. 21.25 × 16 =
  22. 22.75 × 30 =
  23. 23.125 × 24 =
  24. 24.75 × 20 =
  25. 25.125 × 40 =
  26. 26.15 × 10 =
  27. 27.45 × 10 =
  28. 28.125 × 40 =
  29. 29.30 × 15 =
  30. 30.36 × 15 =
  31. 31.25 × 24 =
  32. 32.35 × 26 =
  33. 33.125 × 10 =
  34. 34.55 × 26 =
  35. 35.125 × 30 =
  36. 36.30 × 65 =
  37. 37.38 × 35 =
  38. 38.75 × 20 =
  39. 39.55 × 26 =
  40. 40.65 × 16 =

Answer key

  1. 490
  2. 1120
  3. 1980
  4. 180
  5. 560
  6. 1050
  7. 660
  8. 210
  9. 1260
  10. 950
  11. 1120
  12. 3750
  13. 650
  14. 360
  15. 900
  16. 450
  17. 250
  18. 450
  19. 210
  20. 2850
  21. 400
  22. 2250
  23. 3000
  24. 1500
  25. 5000
  26. 150
  27. 450
  28. 5000
  29. 450
  30. 540
  31. 600
  32. 910
  33. 1250
  34. 1430
  35. 3750
  36. 1950
  37. 1330
  38. 1500
  39. 1430
  40. 1040

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