← Doubling and halving lesson New set →

Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 439 · 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. 2.10 × 55 =
  3. 3.15 × 38 =
  4. 4.45 × 10 =
  5. 5.65 × 6 =
  6. 6.35 × 38 =
  7. 7.20 × 25 =
  8. 8.40 × 25 =
  9. 9.24 × 125 =
  10. 10.15 × 36 =
  11. 11.38 × 25 =
  12. 12.15 × 32 =
  13. 13.38 × 15 =
  14. 14.65 × 38 =
  15. 15.25 × 10 =
  16. 16.15 × 40 =
  17. 17.65 × 26 =
  18. 18.36 × 35 =
  19. 19.25 × 24 =
  20. 20.38 × 65 =
  21. 21.65 × 28 =
  22. 22.24 × 25 =
  23. 23.36 × 75 =
  24. 24.32 × 65 =
  25. 25.35 × 18 =
  26. 26.15 × 6 =
  27. 27.125 × 12 =
  28. 28.38 × 125 =
  29. 29.38 × 55 =
  30. 30.65 × 8 =
  31. 31.55 × 18 =
  32. 32.125 × 32 =
  33. 33.125 × 38 =
  34. 34.10 × 15 =
  35. 35.12 × 55 =
  36. 36.36 × 25 =
  37. 37.34 × 25 =
  38. 38.25 × 36 =
  39. 39.15 × 18 =
  40. 40.55 × 22 =

Answer key

  1. 300
  2. 550
  3. 570
  4. 450
  5. 390
  6. 1330
  7. 500
  8. 1000
  9. 3000
  10. 540
  11. 950
  12. 480
  13. 570
  14. 2470
  15. 250
  16. 600
  17. 1690
  18. 1260
  19. 600
  20. 2470
  21. 1820
  22. 600
  23. 2700
  24. 2080
  25. 630
  26. 90
  27. 1500
  28. 4750
  29. 2090
  30. 520
  31. 990
  32. 4000
  33. 4750
  34. 150
  35. 660
  36. 900
  37. 850
  38. 900
  39. 270
  40. 1210

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