← Doubling and halving lesson New set →

Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 115 · 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. 1.15 × 20 =
  2. 2.40 × 45 =
  3. 3.26 × 25 =
  4. 4.125 × 38 =
  5. 5.35 × 10 =
  6. 6.35 × 36 =
  7. 7.22 × 35 =
  8. 8.36 × 125 =
  9. 9.34 × 35 =
  10. 10.38 × 55 =
  11. 11.36 × 65 =
  12. 12.34 × 25 =
  13. 13.25 × 12 =
  14. 14.6 × 35 =
  15. 15.12 × 35 =
  16. 16.30 × 75 =
  17. 17.55 × 6 =
  18. 18.22 × 15 =
  19. 19.8 × 125 =
  20. 20.55 × 34 =
  21. 21.10 × 55 =
  22. 22.65 × 32 =
  23. 23.15 × 16 =
  24. 24.55 × 18 =
  25. 25.25 × 32 =
  26. 26.45 × 10 =
  27. 27.35 × 12 =
  28. 28.12 × 15 =
  29. 29.125 × 40 =
  30. 30.65 × 20 =
  31. 31.25 × 18 =
  32. 32.45 × 12 =
  33. 33.65 × 24 =
  34. 34.28 × 65 =
  35. 35.65 × 40 =
  36. 36.32 × 15 =
  37. 37.35 × 32 =
  38. 38.6 × 25 =
  39. 39.55 × 22 =
  40. 40.65 × 18 =

Answer key

  1. 300
  2. 1800
  3. 650
  4. 4750
  5. 350
  6. 1260
  7. 770
  8. 4500
  9. 1190
  10. 2090
  11. 2340
  12. 850
  13. 300
  14. 210
  15. 420
  16. 2250
  17. 330
  18. 330
  19. 1000
  20. 1870
  21. 550
  22. 2080
  23. 240
  24. 990
  25. 800
  26. 450
  27. 420
  28. 180
  29. 5000
  30. 1300
  31. 450
  32. 540
  33. 1560
  34. 1820
  35. 2600
  36. 480
  37. 1120
  38. 150
  39. 1210
  40. 1170

Free tables & multiplication lessons, practice and worksheets at talentjr.in/multiplication-tables