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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 511 · 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. 1.30 × 25 =
  2. 2.40 × 15 =
  3. 3.25 × 28 =
  4. 4.40 × 15 =
  5. 5.20 × 25 =
  6. 6.35 × 40 =
  7. 7.125 × 18 =
  8. 8.25 × 32 =
  9. 9.40 × 35 =
  10. 10.55 × 18 =
  11. 11.6 × 35 =
  12. 12.55 × 20 =
  13. 13.25 × 36 =
  14. 14.12 × 75 =
  15. 15.45 × 6 =
  16. 16.40 × 25 =
  17. 17.16 × 15 =
  18. 18.55 × 6 =
  19. 19.65 × 6 =
  20. 20.75 × 14 =
  21. 21.55 × 6 =
  22. 22.12 × 55 =
  23. 23.75 × 20 =
  24. 24.45 × 30 =
  25. 25.24 × 75 =
  26. 26.25 × 30 =
  27. 27.65 × 14 =
  28. 28.45 × 14 =
  29. 29.26 × 65 =
  30. 30.65 × 38 =
  31. 31.36 × 45 =
  32. 32.25 × 10 =
  33. 33.12 × 35 =
  34. 34.45 × 12 =
  35. 35.18 × 75 =
  36. 36.65 × 32 =
  37. 37.45 × 34 =
  38. 38.25 × 6 =
  39. 39.55 × 26 =
  40. 40.16 × 25 =

Answer key

  1. 750
  2. 600
  3. 700
  4. 600
  5. 500
  6. 1400
  7. 2250
  8. 800
  9. 1400
  10. 990
  11. 210
  12. 1100
  13. 900
  14. 900
  15. 270
  16. 1000
  17. 240
  18. 330
  19. 390
  20. 1050
  21. 330
  22. 660
  23. 1500
  24. 1350
  25. 1800
  26. 750
  27. 910
  28. 630
  29. 1690
  30. 2470
  31. 1620
  32. 250
  33. 420
  34. 540
  35. 1350
  36. 2080
  37. 1530
  38. 150
  39. 1430
  40. 400

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