← Doubling and halving lesson New set →

Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 331 · 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. 1.65 × 36 =
  2. 2.40 × 75 =
  3. 3.38 × 55 =
  4. 4.75 × 34 =
  5. 5.75 × 38 =
  6. 6.35 × 18 =
  7. 7.65 × 6 =
  8. 8.125 × 22 =
  9. 9.65 × 22 =
  10. 10.15 × 40 =
  11. 11.15 × 38 =
  12. 12.25 × 38 =
  13. 13.75 × 32 =
  14. 14.45 × 6 =
  15. 15.75 × 10 =
  16. 16.14 × 35 =
  17. 17.20 × 75 =
  18. 18.55 × 30 =
  19. 19.18 × 55 =
  20. 20.45 × 16 =
  21. 21.24 × 15 =
  22. 22.55 × 20 =
  23. 23.75 × 16 =
  24. 24.65 × 16 =
  25. 25.14 × 45 =
  26. 26.65 × 28 =
  27. 27.75 × 30 =
  28. 28.65 × 16 =
  29. 29.38 × 25 =
  30. 30.25 × 8 =
  31. 31.65 × 30 =
  32. 32.15 × 10 =
  33. 33.26 × 45 =
  34. 34.35 × 14 =
  35. 35.55 × 16 =
  36. 36.40 × 15 =
  37. 37.16 × 25 =
  38. 38.28 × 35 =
  39. 39.25 × 28 =
  40. 40.45 × 18 =

Answer key

  1. 2340
  2. 3000
  3. 2090
  4. 2550
  5. 2850
  6. 630
  7. 390
  8. 2750
  9. 1430
  10. 600
  11. 570
  12. 950
  13. 2400
  14. 270
  15. 750
  16. 490
  17. 1500
  18. 1650
  19. 990
  20. 720
  21. 360
  22. 1100
  23. 1200
  24. 1040
  25. 630
  26. 1820
  27. 2250
  28. 1040
  29. 950
  30. 200
  31. 1950
  32. 150
  33. 1170
  34. 490
  35. 880
  36. 600
  37. 400
  38. 980
  39. 700
  40. 810

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