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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 680 · 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. 1.75 × 18 =
  2. 2.34 × 35 =
  3. 3.8 × 35 =
  4. 4.35 × 40 =
  5. 5.125 × 18 =
  6. 6.15 × 22 =
  7. 7.10 × 75 =
  8. 8.25 × 22 =
  9. 9.65 × 22 =
  10. 10.75 × 20 =
  11. 11.55 × 26 =
  12. 12.25 × 38 =
  13. 13.26 × 125 =
  14. 14.24 × 15 =
  15. 15.75 × 6 =
  16. 16.65 × 24 =
  17. 17.35 × 30 =
  18. 18.55 × 26 =
  19. 19.22 × 15 =
  20. 20.65 × 14 =
  21. 21.40 × 125 =
  22. 22.32 × 35 =
  23. 23.15 × 26 =
  24. 24.8 × 15 =
  25. 25.125 × 38 =
  26. 26.30 × 75 =
  27. 27.8 × 25 =
  28. 28.45 × 38 =
  29. 29.55 × 8 =
  30. 30.25 × 6 =
  31. 31.35 × 26 =
  32. 32.16 × 35 =
  33. 33.28 × 15 =
  34. 34.35 × 24 =
  35. 35.26 × 15 =
  36. 36.15 × 30 =
  37. 37.22 × 125 =
  38. 38.14 × 65 =
  39. 39.34 × 45 =
  40. 40.28 × 15 =

Answer key

  1. 1350
  2. 1190
  3. 280
  4. 1400
  5. 2250
  6. 330
  7. 750
  8. 550
  9. 1430
  10. 1500
  11. 1430
  12. 950
  13. 3250
  14. 360
  15. 450
  16. 1560
  17. 1050
  18. 1430
  19. 330
  20. 910
  21. 5000
  22. 1120
  23. 390
  24. 120
  25. 4750
  26. 2250
  27. 200
  28. 1710
  29. 440
  30. 150
  31. 910
  32. 560
  33. 420
  34. 840
  35. 390
  36. 450
  37. 2750
  38. 910
  39. 1530
  40. 420

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