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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 623 · 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. 1.65 × 32 =
  2. 2.35 × 22 =
  3. 3.16 × 35 =
  4. 4.25 × 18 =
  5. 5.30 × 55 =
  6. 6.75 × 28 =
  7. 7.12 × 55 =
  8. 8.55 × 20 =
  9. 9.125 × 32 =
  10. 10.65 × 24 =
  11. 11.40 × 125 =
  12. 12.35 × 36 =
  13. 13.14 × 65 =
  14. 14.55 × 18 =
  15. 15.65 × 38 =
  16. 16.16 × 75 =
  17. 17.125 × 38 =
  18. 18.6 × 65 =
  19. 19.18 × 15 =
  20. 20.30 × 25 =
  21. 21.26 × 35 =
  22. 22.45 × 12 =
  23. 23.36 × 25 =
  24. 24.55 × 30 =
  25. 25.45 × 26 =
  26. 26.6 × 35 =
  27. 27.125 × 28 =
  28. 28.25 × 10 =
  29. 29.125 × 12 =
  30. 30.45 × 16 =
  31. 31.40 × 55 =
  32. 32.16 × 125 =
  33. 33.24 × 15 =
  34. 34.55 × 34 =
  35. 35.18 × 15 =
  36. 36.12 × 15 =
  37. 37.26 × 45 =
  38. 38.65 × 30 =
  39. 39.22 × 15 =
  40. 40.15 × 30 =

Answer key

  1. 2080
  2. 770
  3. 560
  4. 450
  5. 1650
  6. 2100
  7. 660
  8. 1100
  9. 4000
  10. 1560
  11. 5000
  12. 1260
  13. 910
  14. 990
  15. 2470
  16. 1200
  17. 4750
  18. 390
  19. 270
  20. 750
  21. 910
  22. 540
  23. 900
  24. 1650
  25. 1170
  26. 210
  27. 3500
  28. 250
  29. 1500
  30. 720
  31. 2200
  32. 2000
  33. 360
  34. 1870
  35. 270
  36. 180
  37. 1170
  38. 1950
  39. 330
  40. 450

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