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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 327 · 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 × 8 =
  2. 2.38 × 25 =
  3. 3.35 × 14 =
  4. 4.45 × 28 =
  5. 5.10 × 65 =
  6. 6.14 × 65 =
  7. 7.34 × 55 =
  8. 8.38 × 65 =
  9. 9.20 × 15 =
  10. 10.15 × 8 =
  11. 11.6 × 55 =
  12. 12.125 × 32 =
  13. 13.25 × 28 =
  14. 14.65 × 26 =
  15. 15.125 × 36 =
  16. 16.10 × 35 =
  17. 17.65 × 8 =
  18. 18.16 × 75 =
  19. 19.125 × 8 =
  20. 20.22 × 65 =
  21. 21.14 × 55 =
  22. 22.26 × 65 =
  23. 23.24 × 25 =
  24. 24.65 × 36 =
  25. 25.12 × 35 =
  26. 26.45 × 18 =
  27. 27.15 × 20 =
  28. 28.65 × 40 =
  29. 29.15 × 14 =
  30. 30.24 × 15 =
  31. 31.15 × 20 =
  32. 32.45 × 18 =
  33. 33.35 × 8 =
  34. 34.38 × 35 =
  35. 35.18 × 55 =
  36. 36.15 × 16 =
  37. 37.15 × 10 =
  38. 38.8 × 15 =
  39. 39.18 × 45 =
  40. 40.125 × 6 =

Answer key

  1. 520
  2. 950
  3. 490
  4. 1260
  5. 650
  6. 910
  7. 1870
  8. 2470
  9. 300
  10. 120
  11. 330
  12. 4000
  13. 700
  14. 1690
  15. 4500
  16. 350
  17. 520
  18. 1200
  19. 1000
  20. 1430
  21. 770
  22. 1690
  23. 600
  24. 2340
  25. 420
  26. 810
  27. 300
  28. 2600
  29. 210
  30. 360
  31. 300
  32. 810
  33. 280
  34. 1330
  35. 990
  36. 240
  37. 150
  38. 120
  39. 810
  40. 750

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