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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 663 · 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 × 35 =
  2. 2.55 × 32 =
  3. 3.55 × 34 =
  4. 4.15 × 40 =
  5. 5.25 × 36 =
  6. 6.24 × 125 =
  7. 7.40 × 125 =
  8. 8.65 × 20 =
  9. 9.65 × 16 =
  10. 10.65 × 38 =
  11. 11.25 × 12 =
  12. 12.26 × 75 =
  13. 13.15 × 14 =
  14. 14.25 × 10 =
  15. 15.18 × 75 =
  16. 16.125 × 16 =
  17. 17.36 × 15 =
  18. 18.16 × 125 =
  19. 19.30 × 25 =
  20. 20.26 × 75 =
  21. 21.36 × 35 =
  22. 22.26 × 55 =
  23. 23.15 × 32 =
  24. 24.15 × 18 =
  25. 25.40 × 65 =
  26. 26.14 × 45 =
  27. 27.34 × 65 =
  28. 28.35 × 36 =
  29. 29.18 × 125 =
  30. 30.20 × 25 =
  31. 31.22 × 45 =
  32. 32.45 × 24 =
  33. 33.10 × 25 =
  34. 34.75 × 36 =
  35. 35.14 × 15 =
  36. 36.30 × 125 =
  37. 37.15 × 34 =
  38. 38.8 × 65 =
  39. 39.38 × 35 =
  40. 40.35 × 8 =

Answer key

  1. 280
  2. 1760
  3. 1870
  4. 600
  5. 900
  6. 3000
  7. 5000
  8. 1300
  9. 1040
  10. 2470
  11. 300
  12. 1950
  13. 210
  14. 250
  15. 1350
  16. 2000
  17. 540
  18. 2000
  19. 750
  20. 1950
  21. 1260
  22. 1430
  23. 480
  24. 270
  25. 2600
  26. 630
  27. 2210
  28. 1260
  29. 2250
  30. 500
  31. 990
  32. 1080
  33. 250
  34. 2700
  35. 210
  36. 3750
  37. 510
  38. 520
  39. 1330
  40. 280

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