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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 316 · 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. 1.45 × 22 =
  2. 2.45 × 16 =
  3. 3.18 × 35 =
  4. 4.22 × 125 =
  5. 5.10 × 65 =
  6. 6.125 × 32 =
  7. 7.24 × 55 =
  8. 8.38 × 15 =
  9. 9.45 × 8 =
  10. 10.16 × 75 =
  11. 11.10 × 125 =
  12. 12.34 × 45 =
  13. 13.38 × 15 =
  14. 14.36 × 35 =
  15. 15.35 × 24 =
  16. 16.55 × 34 =
  17. 17.65 × 40 =
  18. 18.6 × 55 =
  19. 19.45 × 36 =
  20. 20.34 × 35 =
  21. 21.28 × 25 =
  22. 22.6 × 25 =
  23. 23.40 × 55 =
  24. 24.75 × 12 =
  25. 25.45 × 30 =
  26. 26.8 × 25 =
  27. 27.35 × 34 =
  28. 28.26 × 55 =
  29. 29.125 × 8 =
  30. 30.35 × 18 =
  31. 31.45 × 10 =
  32. 32.8 × 35 =
  33. 33.25 × 16 =
  34. 34.45 × 24 =
  35. 35.35 × 30 =
  36. 36.12 × 35 =
  37. 37.65 × 40 =
  38. 38.14 × 125 =
  39. 39.125 × 6 =
  40. 40.15 × 14 =

Answer key

  1. 990
  2. 720
  3. 630
  4. 2750
  5. 650
  6. 4000
  7. 1320
  8. 570
  9. 360
  10. 1200
  11. 1250
  12. 1530
  13. 570
  14. 1260
  15. 840
  16. 1870
  17. 2600
  18. 330
  19. 1620
  20. 1190
  21. 700
  22. 150
  23. 2200
  24. 900
  25. 1350
  26. 200
  27. 1190
  28. 1430
  29. 1000
  30. 630
  31. 450
  32. 280
  33. 400
  34. 1080
  35. 1050
  36. 420
  37. 2600
  38. 1750
  39. 750
  40. 210

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