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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 407 · 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. 1.8 × 125 =
  2. 2.24 × 15 =
  3. 3.75 × 38 =
  4. 4.10 × 45 =
  5. 5.22 × 25 =
  6. 6.34 × 25 =
  7. 7.36 × 35 =
  8. 8.10 × 25 =
  9. 9.45 × 40 =
  10. 10.125 × 10 =
  11. 11.32 × 45 =
  12. 12.75 × 8 =
  13. 13.125 × 32 =
  14. 14.55 × 12 =
  15. 15.75 × 12 =
  16. 16.45 × 24 =
  17. 17.16 × 75 =
  18. 18.15 × 36 =
  19. 19.15 × 26 =
  20. 20.45 × 28 =
  21. 21.6 × 45 =
  22. 22.6 × 25 =
  23. 23.15 × 20 =
  24. 24.55 × 26 =
  25. 25.26 × 125 =
  26. 26.38 × 35 =
  27. 27.25 × 28 =
  28. 28.25 × 38 =
  29. 29.15 × 16 =
  30. 30.125 × 12 =
  31. 31.16 × 35 =
  32. 32.55 × 28 =
  33. 33.38 × 65 =
  34. 34.12 × 25 =
  35. 35.65 × 14 =
  36. 36.14 × 125 =
  37. 37.55 × 40 =
  38. 38.38 × 55 =
  39. 39.15 × 12 =
  40. 40.35 × 14 =

Answer key

  1. 1000
  2. 360
  3. 2850
  4. 450
  5. 550
  6. 850
  7. 1260
  8. 250
  9. 1800
  10. 1250
  11. 1440
  12. 600
  13. 4000
  14. 660
  15. 900
  16. 1080
  17. 1200
  18. 540
  19. 390
  20. 1260
  21. 270
  22. 150
  23. 300
  24. 1430
  25. 3250
  26. 1330
  27. 700
  28. 950
  29. 240
  30. 1500
  31. 560
  32. 1540
  33. 2470
  34. 300
  35. 910
  36. 1750
  37. 2200
  38. 2090
  39. 180
  40. 490

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