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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 348 · 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. 1.45 × 8 =
  2. 2.25 × 12 =
  3. 3.35 × 30 =
  4. 4.36 × 65 =
  5. 5.38 × 75 =
  6. 6.45 × 14 =
  7. 7.8 × 55 =
  8. 8.55 × 26 =
  9. 9.25 × 34 =
  10. 10.40 × 35 =
  11. 11.10 × 125 =
  12. 12.65 × 40 =
  13. 13.6 × 125 =
  14. 14.12 × 45 =
  15. 15.75 × 16 =
  16. 16.36 × 35 =
  17. 17.125 × 12 =
  18. 18.35 × 8 =
  19. 19.8 × 65 =
  20. 20.28 × 125 =
  21. 21.45 × 6 =
  22. 22.65 × 32 =
  23. 23.12 × 35 =
  24. 24.40 × 75 =
  25. 25.8 × 25 =
  26. 26.14 × 75 =
  27. 27.125 × 6 =
  28. 28.65 × 20 =
  29. 29.24 × 35 =
  30. 30.65 × 12 =
  31. 31.25 × 12 =
  32. 32.34 × 75 =
  33. 33.22 × 45 =
  34. 34.65 × 24 =
  35. 35.45 × 18 =
  36. 36.15 × 12 =
  37. 37.38 × 25 =
  38. 38.125 × 24 =
  39. 39.16 × 125 =
  40. 40.36 × 45 =

Answer key

  1. 360
  2. 300
  3. 1050
  4. 2340
  5. 2850
  6. 630
  7. 440
  8. 1430
  9. 850
  10. 1400
  11. 1250
  12. 2600
  13. 750
  14. 540
  15. 1200
  16. 1260
  17. 1500
  18. 280
  19. 520
  20. 3500
  21. 270
  22. 2080
  23. 420
  24. 3000
  25. 200
  26. 1050
  27. 750
  28. 1300
  29. 840
  30. 780
  31. 300
  32. 2550
  33. 990
  34. 1560
  35. 810
  36. 180
  37. 950
  38. 3000
  39. 2000
  40. 1620

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