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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 81 · 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. 1.14 × 25 =
  2. 2.35 × 38 =
  3. 3.26 × 25 =
  4. 4.25 × 6 =
  5. 5.16 × 75 =
  6. 6.6 × 15 =
  7. 7.10 × 45 =
  8. 8.34 × 65 =
  9. 9.16 × 55 =
  10. 10.35 × 14 =
  11. 11.32 × 25 =
  12. 12.75 × 36 =
  13. 13.16 × 35 =
  14. 14.10 × 65 =
  15. 15.26 × 35 =
  16. 16.12 × 75 =
  17. 17.125 × 32 =
  18. 18.75 × 30 =
  19. 19.45 × 10 =
  20. 20.10 × 15 =
  21. 21.45 × 18 =
  22. 22.15 × 38 =
  23. 23.28 × 75 =
  24. 24.22 × 55 =
  25. 25.55 × 14 =
  26. 26.15 × 40 =
  27. 27.35 × 22 =
  28. 28.65 × 12 =
  29. 29.18 × 15 =
  30. 30.125 × 26 =
  31. 31.32 × 35 =
  32. 32.65 × 24 =
  33. 33.30 × 45 =
  34. 34.65 × 14 =
  35. 35.16 × 15 =
  36. 36.16 × 75 =
  37. 37.125 × 32 =
  38. 38.45 × 22 =
  39. 39.35 × 20 =
  40. 40.20 × 75 =

Answer key

  1. 350
  2. 1330
  3. 650
  4. 150
  5. 1200
  6. 90
  7. 450
  8. 2210
  9. 880
  10. 490
  11. 800
  12. 2700
  13. 560
  14. 650
  15. 910
  16. 900
  17. 4000
  18. 2250
  19. 450
  20. 150
  21. 810
  22. 570
  23. 2100
  24. 1210
  25. 770
  26. 600
  27. 770
  28. 780
  29. 270
  30. 3250
  31. 1120
  32. 1560
  33. 1350
  34. 910
  35. 240
  36. 1200
  37. 4000
  38. 990
  39. 700
  40. 1500

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