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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 180 · 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. 1.55 × 6 =
  2. 2.36 × 125 =
  3. 3.65 × 6 =
  4. 4.12 × 125 =
  5. 5.15 × 30 =
  6. 6.18 × 55 =
  7. 7.25 × 40 =
  8. 8.26 × 35 =
  9. 9.65 × 10 =
  10. 10.14 × 45 =
  11. 11.26 × 65 =
  12. 12.32 × 35 =
  13. 13.26 × 35 =
  14. 14.24 × 25 =
  15. 15.45 × 34 =
  16. 16.30 × 75 =
  17. 17.14 × 25 =
  18. 18.34 × 55 =
  19. 19.12 × 75 =
  20. 20.25 × 10 =
  21. 21.8 × 35 =
  22. 22.12 × 25 =
  23. 23.35 × 36 =
  24. 24.6 × 35 =
  25. 25.45 × 30 =
  26. 26.45 × 40 =
  27. 27.75 × 16 =
  28. 28.75 × 16 =
  29. 29.12 × 35 =
  30. 30.55 × 24 =
  31. 31.35 × 38 =
  32. 32.65 × 10 =
  33. 33.15 × 12 =
  34. 34.65 × 22 =
  35. 35.15 × 34 =
  36. 36.125 × 18 =
  37. 37.55 × 12 =
  38. 38.34 × 55 =
  39. 39.36 × 25 =
  40. 40.15 × 32 =

Answer key

  1. 330
  2. 4500
  3. 390
  4. 1500
  5. 450
  6. 990
  7. 1000
  8. 910
  9. 650
  10. 630
  11. 1690
  12. 1120
  13. 910
  14. 600
  15. 1530
  16. 2250
  17. 350
  18. 1870
  19. 900
  20. 250
  21. 280
  22. 300
  23. 1260
  24. 210
  25. 1350
  26. 1800
  27. 1200
  28. 1200
  29. 420
  30. 1320
  31. 1330
  32. 650
  33. 180
  34. 1430
  35. 510
  36. 2250
  37. 660
  38. 1870
  39. 900
  40. 480

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