← Doubling and halving lesson New set →

Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 778 · 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. 1.25 × 20 =
  2. 2.14 × 15 =
  3. 3.55 × 22 =
  4. 4.15 × 12 =
  5. 5.45 × 40 =
  6. 6.20 × 75 =
  7. 7.35 × 18 =
  8. 8.15 × 12 =
  9. 9.26 × 55 =
  10. 10.22 × 125 =
  11. 11.8 × 125 =
  12. 12.36 × 25 =
  13. 13.40 × 45 =
  14. 14.45 × 10 =
  15. 15.35 × 12 =
  16. 16.6 × 25 =
  17. 17.15 × 10 =
  18. 18.65 × 8 =
  19. 19.125 × 10 =
  20. 20.55 × 24 =
  21. 21.8 × 35 =
  22. 22.35 × 12 =
  23. 23.26 × 55 =
  24. 24.125 × 14 =
  25. 25.10 × 35 =
  26. 26.125 × 26 =
  27. 27.16 × 45 =
  28. 28.25 × 40 =
  29. 29.25 × 6 =
  30. 30.32 × 35 =
  31. 31.26 × 125 =
  32. 32.10 × 35 =
  33. 33.12 × 55 =
  34. 34.125 × 14 =
  35. 35.125 × 30 =
  36. 36.125 × 12 =
  37. 37.12 × 65 =
  38. 38.38 × 75 =
  39. 39.75 × 40 =
  40. 40.10 × 15 =

Answer key

  1. 500
  2. 210
  3. 1210
  4. 180
  5. 1800
  6. 1500
  7. 630
  8. 180
  9. 1430
  10. 2750
  11. 1000
  12. 900
  13. 1800
  14. 450
  15. 420
  16. 150
  17. 150
  18. 520
  19. 1250
  20. 1320
  21. 280
  22. 420
  23. 1430
  24. 1750
  25. 350
  26. 3250
  27. 720
  28. 1000
  29. 150
  30. 1120
  31. 3250
  32. 350
  33. 660
  34. 1750
  35. 3750
  36. 1500
  37. 780
  38. 2850
  39. 3000
  40. 150

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