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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 145 · 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 × 12 =
  2. 2.25 × 26 =
  3. 3.6 × 45 =
  4. 4.75 × 30 =
  5. 5.55 × 6 =
  6. 6.15 × 22 =
  7. 7.32 × 65 =
  8. 8.65 × 6 =
  9. 9.40 × 125 =
  10. 10.55 × 6 =
  11. 11.45 × 30 =
  12. 12.35 × 20 =
  13. 13.16 × 35 =
  14. 14.15 × 38 =
  15. 15.65 × 28 =
  16. 16.15 × 40 =
  17. 17.125 × 36 =
  18. 18.38 × 65 =
  19. 19.6 × 15 =
  20. 20.34 × 25 =
  21. 21.26 × 55 =
  22. 22.30 × 35 =
  23. 23.35 × 6 =
  24. 24.15 × 18 =
  25. 25.15 × 26 =
  26. 26.55 × 10 =
  27. 27.55 × 6 =
  28. 28.75 × 40 =
  29. 29.65 × 36 =
  30. 30.15 × 8 =
  31. 31.45 × 14 =
  32. 32.15 × 32 =
  33. 33.65 × 12 =
  34. 34.45 × 30 =
  35. 35.15 × 24 =
  36. 36.75 × 30 =
  37. 37.20 × 75 =
  38. 38.125 × 32 =
  39. 39.20 × 75 =
  40. 40.45 × 6 =

Answer key

  1. 900
  2. 650
  3. 270
  4. 2250
  5. 330
  6. 330
  7. 2080
  8. 390
  9. 5000
  10. 330
  11. 1350
  12. 700
  13. 560
  14. 570
  15. 1820
  16. 600
  17. 4500
  18. 2470
  19. 90
  20. 850
  21. 1430
  22. 1050
  23. 210
  24. 270
  25. 390
  26. 550
  27. 330
  28. 3000
  29. 2340
  30. 120
  31. 630
  32. 480
  33. 780
  34. 1350
  35. 360
  36. 2250
  37. 1500
  38. 4000
  39. 1500
  40. 270

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