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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 169 · 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. 1.6 × 55 =
  2. 2.55 × 6 =
  3. 3.125 × 16 =
  4. 4.26 × 65 =
  5. 5.6 × 45 =
  6. 6.34 × 15 =
  7. 7.25 × 24 =
  8. 8.75 × 20 =
  9. 9.18 × 55 =
  10. 10.24 × 35 =
  11. 11.45 × 14 =
  12. 12.18 × 45 =
  13. 13.30 × 15 =
  14. 14.18 × 125 =
  15. 15.75 × 16 =
  16. 16.6 × 35 =
  17. 17.6 × 75 =
  18. 18.25 × 18 =
  19. 19.55 × 12 =
  20. 20.15 × 24 =
  21. 21.75 × 8 =
  22. 22.55 × 40 =
  23. 23.36 × 45 =
  24. 24.35 × 40 =
  25. 25.30 × 25 =
  26. 26.125 × 8 =
  27. 27.36 × 55 =
  28. 28.75 × 30 =
  29. 29.75 × 32 =
  30. 30.26 × 25 =
  31. 31.10 × 65 =
  32. 32.25 × 12 =
  33. 33.15 × 30 =
  34. 34.35 × 16 =
  35. 35.125 × 6 =
  36. 36.32 × 25 =
  37. 37.15 × 22 =
  38. 38.20 × 15 =
  39. 39.12 × 15 =
  40. 40.34 × 35 =

Answer key

  1. 330
  2. 330
  3. 2000
  4. 1690
  5. 270
  6. 510
  7. 600
  8. 1500
  9. 990
  10. 840
  11. 630
  12. 810
  13. 450
  14. 2250
  15. 1200
  16. 210
  17. 450
  18. 450
  19. 660
  20. 360
  21. 600
  22. 2200
  23. 1620
  24. 1400
  25. 750
  26. 1000
  27. 1980
  28. 2250
  29. 2400
  30. 650
  31. 650
  32. 300
  33. 450
  34. 560
  35. 750
  36. 800
  37. 330
  38. 300
  39. 180
  40. 1190

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