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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 349 · 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. 1.65 × 22 =
  2. 2.18 × 35 =
  3. 3.35 × 24 =
  4. 4.45 × 22 =
  5. 5.12 × 55 =
  6. 6.15 × 40 =
  7. 7.6 × 75 =
  8. 8.36 × 125 =
  9. 9.26 × 75 =
  10. 10.28 × 75 =
  11. 11.32 × 125 =
  12. 12.6 × 75 =
  13. 13.35 × 10 =
  14. 14.55 × 36 =
  15. 15.55 × 12 =
  16. 16.12 × 75 =
  17. 17.35 × 10 =
  18. 18.65 × 8 =
  19. 19.32 × 55 =
  20. 20.75 × 18 =
  21. 21.38 × 35 =
  22. 22.6 × 25 =
  23. 23.36 × 25 =
  24. 24.25 × 40 =
  25. 25.6 × 35 =
  26. 26.125 × 18 =
  27. 27.15 × 24 =
  28. 28.40 × 15 =
  29. 29.14 × 75 =
  30. 30.30 × 25 =
  31. 31.14 × 65 =
  32. 32.35 × 40 =
  33. 33.125 × 10 =
  34. 34.10 × 125 =
  35. 35.15 × 16 =
  36. 36.75 × 28 =
  37. 37.25 × 20 =
  38. 38.45 × 6 =
  39. 39.6 × 55 =
  40. 40.40 × 35 =

Answer key

  1. 1430
  2. 630
  3. 840
  4. 990
  5. 660
  6. 600
  7. 450
  8. 4500
  9. 1950
  10. 2100
  11. 4000
  12. 450
  13. 350
  14. 1980
  15. 660
  16. 900
  17. 350
  18. 520
  19. 1760
  20. 1350
  21. 1330
  22. 150
  23. 900
  24. 1000
  25. 210
  26. 2250
  27. 360
  28. 600
  29. 1050
  30. 750
  31. 910
  32. 1400
  33. 1250
  34. 1250
  35. 240
  36. 2100
  37. 500
  38. 270
  39. 330
  40. 1400

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