← Doubling and halving lesson New set →

Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 659 · 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 × 14 =
  2. 2.8 × 15 =
  3. 3.12 × 45 =
  4. 4.125 × 30 =
  5. 5.35 × 6 =
  6. 6.55 × 16 =
  7. 7.16 × 35 =
  8. 8.65 × 20 =
  9. 9.25 × 6 =
  10. 10.24 × 125 =
  11. 11.65 × 8 =
  12. 12.38 × 15 =
  13. 13.75 × 32 =
  14. 14.55 × 32 =
  15. 15.15 × 8 =
  16. 16.24 × 45 =
  17. 17.8 × 125 =
  18. 18.26 × 35 =
  19. 19.15 × 36 =
  20. 20.45 × 10 =
  21. 21.75 × 26 =
  22. 22.65 × 24 =
  23. 23.125 × 24 =
  24. 24.35 × 22 =
  25. 25.45 × 20 =
  26. 26.22 × 45 =
  27. 27.14 × 25 =
  28. 28.14 × 125 =
  29. 29.36 × 15 =
  30. 30.75 × 28 =
  31. 31.35 × 22 =
  32. 32.26 × 35 =
  33. 33.55 × 32 =
  34. 34.75 × 12 =
  35. 35.45 × 34 =
  36. 36.125 × 22 =
  37. 37.14 × 55 =
  38. 38.25 × 6 =
  39. 39.25 × 40 =
  40. 40.18 × 75 =

Answer key

  1. 630
  2. 120
  3. 540
  4. 3750
  5. 210
  6. 880
  7. 560
  8. 1300
  9. 150
  10. 3000
  11. 520
  12. 570
  13. 2400
  14. 1760
  15. 120
  16. 1080
  17. 1000
  18. 910
  19. 540
  20. 450
  21. 1950
  22. 1560
  23. 3000
  24. 770
  25. 900
  26. 990
  27. 350
  28. 1750
  29. 540
  30. 2100
  31. 770
  32. 910
  33. 1760
  34. 900
  35. 1530
  36. 2750
  37. 770
  38. 150
  39. 1000
  40. 1350

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