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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 368 · 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. 1.38 × 35 =
  2. 2.20 × 35 =
  3. 3.45 × 20 =
  4. 4.45 × 28 =
  5. 5.14 × 125 =
  6. 6.16 × 75 =
  7. 7.15 × 24 =
  8. 8.75 × 34 =
  9. 9.125 × 24 =
  10. 10.55 × 40 =
  11. 11.20 × 35 =
  12. 12.10 × 25 =
  13. 13.8 × 25 =
  14. 14.22 × 65 =
  15. 15.25 × 12 =
  16. 16.35 × 20 =
  17. 17.75 × 40 =
  18. 18.25 × 28 =
  19. 19.28 × 55 =
  20. 20.18 × 65 =
  21. 21.20 × 45 =
  22. 22.125 × 40 =
  23. 23.15 × 22 =
  24. 24.55 × 20 =
  25. 25.75 × 8 =
  26. 26.6 × 75 =
  27. 27.65 × 40 =
  28. 28.65 × 36 =
  29. 29.22 × 15 =
  30. 30.30 × 25 =
  31. 31.15 × 30 =
  32. 32.65 × 20 =
  33. 33.35 × 18 =
  34. 34.35 × 34 =
  35. 35.75 × 36 =
  36. 36.34 × 75 =
  37. 37.35 × 18 =
  38. 38.6 × 15 =
  39. 39.32 × 15 =
  40. 40.16 × 35 =

Answer key

  1. 1330
  2. 700
  3. 900
  4. 1260
  5. 1750
  6. 1200
  7. 360
  8. 2550
  9. 3000
  10. 2200
  11. 700
  12. 250
  13. 200
  14. 1430
  15. 300
  16. 700
  17. 3000
  18. 700
  19. 1540
  20. 1170
  21. 900
  22. 5000
  23. 330
  24. 1100
  25. 600
  26. 450
  27. 2600
  28. 2340
  29. 330
  30. 750
  31. 450
  32. 1300
  33. 630
  34. 1190
  35. 2700
  36. 2550
  37. 630
  38. 90
  39. 480
  40. 560

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