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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 113 · 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. 1.22 × 75 =
  2. 2.45 × 40 =
  3. 3.36 × 125 =
  4. 4.125 × 40 =
  5. 5.35 × 16 =
  6. 6.6 × 75 =
  7. 7.75 × 12 =
  8. 8.45 × 12 =
  9. 9.35 × 18 =
  10. 10.8 × 45 =
  11. 11.40 × 55 =
  12. 12.30 × 65 =
  13. 13.25 × 24 =
  14. 14.30 × 45 =
  15. 15.38 × 15 =
  16. 16.55 × 12 =
  17. 17.38 × 35 =
  18. 18.45 × 16 =
  19. 19.125 × 24 =
  20. 20.25 × 10 =
  21. 21.18 × 55 =
  22. 22.14 × 65 =
  23. 23.22 × 65 =
  24. 24.36 × 25 =
  25. 25.15 × 38 =
  26. 26.25 × 12 =
  27. 27.55 × 8 =
  28. 28.15 × 6 =
  29. 29.45 × 30 =
  30. 30.45 × 28 =
  31. 31.38 × 15 =
  32. 32.45 × 10 =
  33. 33.30 × 55 =
  34. 34.45 × 40 =
  35. 35.34 × 35 =
  36. 36.15 × 6 =
  37. 37.38 × 15 =
  38. 38.24 × 15 =
  39. 39.65 × 14 =
  40. 40.125 × 24 =

Answer key

  1. 1650
  2. 1800
  3. 4500
  4. 5000
  5. 560
  6. 450
  7. 900
  8. 540
  9. 630
  10. 360
  11. 2200
  12. 1950
  13. 600
  14. 1350
  15. 570
  16. 660
  17. 1330
  18. 720
  19. 3000
  20. 250
  21. 990
  22. 910
  23. 1430
  24. 900
  25. 570
  26. 300
  27. 440
  28. 90
  29. 1350
  30. 1260
  31. 570
  32. 450
  33. 1650
  34. 1800
  35. 1190
  36. 90
  37. 570
  38. 360
  39. 910
  40. 3000

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