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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 538 · 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. 1.10 × 75 =
  2. 2.125 × 20 =
  3. 3.20 × 55 =
  4. 4.26 × 25 =
  5. 5.40 × 25 =
  6. 6.30 × 45 =
  7. 7.75 × 34 =
  8. 8.55 × 30 =
  9. 9.45 × 30 =
  10. 10.15 × 28 =
  11. 11.25 × 6 =
  12. 12.75 × 18 =
  13. 13.8 × 15 =
  14. 14.16 × 15 =
  15. 15.30 × 75 =
  16. 16.38 × 45 =
  17. 17.22 × 45 =
  18. 18.25 × 28 =
  19. 19.15 × 36 =
  20. 20.45 × 36 =
  21. 21.28 × 25 =
  22. 22.15 × 24 =
  23. 23.20 × 75 =
  24. 24.22 × 125 =
  25. 25.25 × 20 =
  26. 26.40 × 55 =
  27. 27.16 × 35 =
  28. 28.16 × 75 =
  29. 29.35 × 8 =
  30. 30.8 × 35 =
  31. 31.45 × 36 =
  32. 32.35 × 40 =
  33. 33.25 × 36 =
  34. 34.65 × 20 =
  35. 35.8 × 55 =
  36. 36.125 × 10 =
  37. 37.6 × 15 =
  38. 38.45 × 38 =
  39. 39.75 × 6 =
  40. 40.15 × 32 =

Answer key

  1. 750
  2. 2500
  3. 1100
  4. 650
  5. 1000
  6. 1350
  7. 2550
  8. 1650
  9. 1350
  10. 420
  11. 150
  12. 1350
  13. 120
  14. 240
  15. 2250
  16. 1710
  17. 990
  18. 700
  19. 540
  20. 1620
  21. 700
  22. 360
  23. 1500
  24. 2750
  25. 500
  26. 2200
  27. 560
  28. 1200
  29. 280
  30. 280
  31. 1620
  32. 1400
  33. 900
  34. 1300
  35. 440
  36. 1250
  37. 90
  38. 1710
  39. 450
  40. 480

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