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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 708 · 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. 1.12 × 25 =
  2. 2.12 × 75 =
  3. 3.35 × 28 =
  4. 4.30 × 45 =
  5. 5.28 × 25 =
  6. 6.20 × 15 =
  7. 7.6 × 55 =
  8. 8.6 × 15 =
  9. 9.24 × 35 =
  10. 10.55 × 24 =
  11. 11.15 × 10 =
  12. 12.15 × 34 =
  13. 13.25 × 6 =
  14. 14.24 × 65 =
  15. 15.75 × 22 =
  16. 16.30 × 25 =
  17. 17.6 × 55 =
  18. 18.75 × 8 =
  19. 19.35 × 36 =
  20. 20.65 × 20 =
  21. 21.45 × 20 =
  22. 22.35 × 34 =
  23. 23.75 × 34 =
  24. 24.125 × 30 =
  25. 25.15 × 14 =
  26. 26.55 × 24 =
  27. 27.12 × 125 =
  28. 28.125 × 26 =
  29. 29.45 × 14 =
  30. 30.45 × 38 =
  31. 31.125 × 18 =
  32. 32.65 × 28 =
  33. 33.55 × 6 =
  34. 34.28 × 65 =
  35. 35.125 × 18 =
  36. 36.35 × 28 =
  37. 37.40 × 75 =
  38. 38.65 × 20 =
  39. 39.75 × 16 =
  40. 40.45 × 34 =

Answer key

  1. 300
  2. 900
  3. 980
  4. 1350
  5. 700
  6. 300
  7. 330
  8. 90
  9. 840
  10. 1320
  11. 150
  12. 510
  13. 150
  14. 1560
  15. 1650
  16. 750
  17. 330
  18. 600
  19. 1260
  20. 1300
  21. 900
  22. 1190
  23. 2550
  24. 3750
  25. 210
  26. 1320
  27. 1500
  28. 3250
  29. 630
  30. 1710
  31. 2250
  32. 1820
  33. 330
  34. 1820
  35. 2250
  36. 980
  37. 3000
  38. 1300
  39. 1200
  40. 1530

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