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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 307 · 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. 1.16 × 15 =
  2. 2.125 × 12 =
  3. 3.75 × 16 =
  4. 4.26 × 65 =
  5. 5.65 × 34 =
  6. 6.35 × 32 =
  7. 7.15 × 38 =
  8. 8.25 × 10 =
  9. 9.25 × 36 =
  10. 10.30 × 65 =
  11. 11.35 × 8 =
  12. 12.45 × 26 =
  13. 13.35 × 10 =
  14. 14.8 × 65 =
  15. 15.65 × 16 =
  16. 16.45 × 34 =
  17. 17.25 × 12 =
  18. 18.55 × 30 =
  19. 19.28 × 25 =
  20. 20.35 × 26 =
  21. 21.15 × 8 =
  22. 22.16 × 75 =
  23. 23.18 × 25 =
  24. 24.16 × 125 =
  25. 25.55 × 6 =
  26. 26.35 × 12 =
  27. 27.26 × 25 =
  28. 28.12 × 55 =
  29. 29.25 × 12 =
  30. 30.34 × 45 =
  31. 31.125 × 16 =
  32. 32.28 × 25 =
  33. 33.75 × 12 =
  34. 34.24 × 75 =
  35. 35.24 × 65 =
  36. 36.25 × 30 =
  37. 37.65 × 8 =
  38. 38.32 × 35 =
  39. 39.25 × 36 =
  40. 40.6 × 65 =

Answer key

  1. 240
  2. 1500
  3. 1200
  4. 1690
  5. 2210
  6. 1120
  7. 570
  8. 250
  9. 900
  10. 1950
  11. 280
  12. 1170
  13. 350
  14. 520
  15. 1040
  16. 1530
  17. 300
  18. 1650
  19. 700
  20. 910
  21. 120
  22. 1200
  23. 450
  24. 2000
  25. 330
  26. 420
  27. 650
  28. 660
  29. 300
  30. 1530
  31. 2000
  32. 700
  33. 900
  34. 1800
  35. 1560
  36. 750
  37. 520
  38. 1120
  39. 900
  40. 390

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