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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 433 · 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. 1.15 × 22 =
  2. 2.75 × 6 =
  3. 3.15 × 30 =
  4. 4.15 × 10 =
  5. 5.18 × 55 =
  6. 6.38 × 125 =
  7. 7.18 × 45 =
  8. 8.6 × 35 =
  9. 9.15 × 10 =
  10. 10.15 × 6 =
  11. 11.35 × 8 =
  12. 12.24 × 55 =
  13. 13.8 × 75 =
  14. 14.65 × 20 =
  15. 15.45 × 30 =
  16. 16.55 × 34 =
  17. 17.25 × 6 =
  18. 18.55 × 40 =
  19. 19.16 × 55 =
  20. 20.15 × 34 =
  21. 21.32 × 55 =
  22. 22.35 × 12 =
  23. 23.36 × 35 =
  24. 24.25 × 12 =
  25. 25.25 × 38 =
  26. 26.8 × 125 =
  27. 27.45 × 14 =
  28. 28.34 × 35 =
  29. 29.14 × 55 =
  30. 30.36 × 45 =
  31. 31.35 × 24 =
  32. 32.38 × 15 =
  33. 33.25 × 18 =
  34. 34.12 × 45 =
  35. 35.75 × 10 =
  36. 36.125 × 34 =
  37. 37.16 × 45 =
  38. 38.65 × 6 =
  39. 39.26 × 55 =
  40. 40.24 × 35 =

Answer key

  1. 330
  2. 450
  3. 450
  4. 150
  5. 990
  6. 4750
  7. 810
  8. 210
  9. 150
  10. 90
  11. 280
  12. 1320
  13. 600
  14. 1300
  15. 1350
  16. 1870
  17. 150
  18. 2200
  19. 880
  20. 510
  21. 1760
  22. 420
  23. 1260
  24. 300
  25. 950
  26. 1000
  27. 630
  28. 1190
  29. 770
  30. 1620
  31. 840
  32. 570
  33. 450
  34. 540
  35. 750
  36. 4250
  37. 720
  38. 390
  39. 1430
  40. 840

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