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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 586 · 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 × 65 =
  2. 2.20 × 55 =
  3. 3.8 × 55 =
  4. 4.20 × 15 =
  5. 5.125 × 40 =
  6. 6.18 × 25 =
  7. 7.55 × 20 =
  8. 8.75 × 22 =
  9. 9.36 × 35 =
  10. 10.16 × 35 =
  11. 11.45 × 22 =
  12. 12.18 × 35 =
  13. 13.10 × 45 =
  14. 14.24 × 55 =
  15. 15.15 × 6 =
  16. 16.18 × 125 =
  17. 17.15 × 20 =
  18. 18.40 × 15 =
  19. 19.65 × 6 =
  20. 20.125 × 38 =
  21. 21.14 × 125 =
  22. 22.125 × 20 =
  23. 23.10 × 45 =
  24. 24.15 × 32 =
  25. 25.16 × 25 =
  26. 26.75 × 24 =
  27. 27.125 × 14 =
  28. 28.15 × 8 =
  29. 29.45 × 20 =
  30. 30.55 × 26 =
  31. 31.55 × 30 =
  32. 32.45 × 38 =
  33. 33.36 × 125 =
  34. 34.125 × 6 =
  35. 35.15 × 6 =
  36. 36.25 × 8 =
  37. 37.6 × 55 =
  38. 38.55 × 6 =
  39. 39.38 × 15 =
  40. 40.18 × 35 =

Answer key

  1. 390
  2. 1100
  3. 440
  4. 300
  5. 5000
  6. 450
  7. 1100
  8. 1650
  9. 1260
  10. 560
  11. 990
  12. 630
  13. 450
  14. 1320
  15. 90
  16. 2250
  17. 300
  18. 600
  19. 390
  20. 4750
  21. 1750
  22. 2500
  23. 450
  24. 480
  25. 400
  26. 1800
  27. 1750
  28. 120
  29. 900
  30. 1430
  31. 1650
  32. 1710
  33. 4500
  34. 750
  35. 90
  36. 200
  37. 330
  38. 330
  39. 570
  40. 630

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