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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 35 · 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. 1.75 × 22 =
  2. 2.25 × 10 =
  3. 3.55 × 30 =
  4. 4.65 × 32 =
  5. 5.55 × 18 =
  6. 6.125 × 12 =
  7. 7.55 × 28 =
  8. 8.15 × 38 =
  9. 9.24 × 35 =
  10. 10.26 × 15 =
  11. 11.125 × 24 =
  12. 12.15 × 26 =
  13. 13.45 × 10 =
  14. 14.26 × 55 =
  15. 15.20 × 15 =
  16. 16.18 × 75 =
  17. 17.15 × 14 =
  18. 18.30 × 65 =
  19. 19.10 × 15 =
  20. 20.16 × 35 =
  21. 21.14 × 125 =
  22. 22.25 × 24 =
  23. 23.125 × 16 =
  24. 24.75 × 18 =
  25. 25.35 × 10 =
  26. 26.8 × 125 =
  27. 27.15 × 22 =
  28. 28.28 × 25 =
  29. 29.35 × 36 =
  30. 30.14 × 75 =
  31. 31.25 × 22 =
  32. 32.125 × 26 =
  33. 33.35 × 34 =
  34. 34.55 × 32 =
  35. 35.15 × 14 =
  36. 36.65 × 32 =
  37. 37.25 × 24 =
  38. 38.40 × 65 =
  39. 39.36 × 25 =
  40. 40.40 × 75 =

Answer key

  1. 1650
  2. 250
  3. 1650
  4. 2080
  5. 990
  6. 1500
  7. 1540
  8. 570
  9. 840
  10. 390
  11. 3000
  12. 390
  13. 450
  14. 1430
  15. 300
  16. 1350
  17. 210
  18. 1950
  19. 150
  20. 560
  21. 1750
  22. 600
  23. 2000
  24. 1350
  25. 350
  26. 1000
  27. 330
  28. 700
  29. 1260
  30. 1050
  31. 550
  32. 3250
  33. 1190
  34. 1760
  35. 210
  36. 2080
  37. 600
  38. 2600
  39. 900
  40. 3000

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