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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 309 · 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. 1.35 × 34 =
  2. 2.32 × 125 =
  3. 3.18 × 125 =
  4. 4.8 × 15 =
  5. 5.40 × 75 =
  6. 6.20 × 55 =
  7. 7.30 × 55 =
  8. 8.125 × 22 =
  9. 9.65 × 34 =
  10. 10.6 × 45 =
  11. 11.14 × 45 =
  12. 12.55 × 18 =
  13. 13.65 × 14 =
  14. 14.15 × 20 =
  15. 15.28 × 15 =
  16. 16.55 × 40 =
  17. 17.25 × 10 =
  18. 18.35 × 40 =
  19. 19.36 × 125 =
  20. 20.35 × 12 =
  21. 21.125 × 38 =
  22. 22.34 × 15 =
  23. 23.65 × 36 =
  24. 24.14 × 55 =
  25. 25.25 × 12 =
  26. 26.36 × 65 =
  27. 27.36 × 25 =
  28. 28.45 × 22 =
  29. 29.125 × 10 =
  30. 30.55 × 22 =
  31. 31.25 × 30 =
  32. 32.20 × 35 =
  33. 33.25 × 22 =
  34. 34.15 × 38 =
  35. 35.15 × 18 =
  36. 36.15 × 6 =
  37. 37.12 × 65 =
  38. 38.75 × 16 =
  39. 39.14 × 125 =
  40. 40.55 × 36 =

Answer key

  1. 1190
  2. 4000
  3. 2250
  4. 120
  5. 3000
  6. 1100
  7. 1650
  8. 2750
  9. 2210
  10. 270
  11. 630
  12. 990
  13. 910
  14. 300
  15. 420
  16. 2200
  17. 250
  18. 1400
  19. 4500
  20. 420
  21. 4750
  22. 510
  23. 2340
  24. 770
  25. 300
  26. 2340
  27. 900
  28. 990
  29. 1250
  30. 1210
  31. 750
  32. 700
  33. 550
  34. 570
  35. 270
  36. 90
  37. 780
  38. 1200
  39. 1750
  40. 1980

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