← Doubling and halving lesson New set →

Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 512 · 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. 1.36 × 75 =
  2. 2.30 × 15 =
  3. 3.125 × 38 =
  4. 4.45 × 6 =
  5. 5.25 × 34 =
  6. 6.32 × 125 =
  7. 7.55 × 26 =
  8. 8.22 × 125 =
  9. 9.65 × 40 =
  10. 10.8 × 125 =
  11. 11.75 × 12 =
  12. 12.125 × 22 =
  13. 13.55 × 30 =
  14. 14.12 × 125 =
  15. 15.25 × 16 =
  16. 16.10 × 75 =
  17. 17.65 × 32 =
  18. 18.25 × 16 =
  19. 19.14 × 65 =
  20. 20.15 × 18 =
  21. 21.38 × 15 =
  22. 22.6 × 65 =
  23. 23.125 × 26 =
  24. 24.14 × 15 =
  25. 25.15 × 12 =
  26. 26.10 × 25 =
  27. 27.8 × 125 =
  28. 28.16 × 15 =
  29. 29.15 × 10 =
  30. 30.55 × 36 =
  31. 31.32 × 45 =
  32. 32.55 × 12 =
  33. 33.25 × 14 =
  34. 34.125 × 14 =
  35. 35.65 × 14 =
  36. 36.12 × 35 =
  37. 37.35 × 10 =
  38. 38.36 × 55 =
  39. 39.75 × 18 =
  40. 40.125 × 38 =

Answer key

  1. 2700
  2. 450
  3. 4750
  4. 270
  5. 850
  6. 4000
  7. 1430
  8. 2750
  9. 2600
  10. 1000
  11. 900
  12. 2750
  13. 1650
  14. 1500
  15. 400
  16. 750
  17. 2080
  18. 400
  19. 910
  20. 270
  21. 570
  22. 390
  23. 3250
  24. 210
  25. 180
  26. 250
  27. 1000
  28. 240
  29. 150
  30. 1980
  31. 1440
  32. 660
  33. 350
  34. 1750
  35. 910
  36. 420
  37. 350
  38. 1980
  39. 1350
  40. 4750

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