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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 751 · 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. 1.125 × 30 =
  2. 2.40 × 65 =
  3. 3.18 × 65 =
  4. 4.24 × 55 =
  5. 5.10 × 25 =
  6. 6.12 × 25 =
  7. 7.12 × 25 =
  8. 8.12 × 45 =
  9. 9.6 × 45 =
  10. 10.10 × 15 =
  11. 11.55 × 14 =
  12. 12.15 × 6 =
  13. 13.45 × 32 =
  14. 14.6 × 25 =
  15. 15.55 × 26 =
  16. 16.16 × 25 =
  17. 17.75 × 18 =
  18. 18.65 × 14 =
  19. 19.55 × 24 =
  20. 20.24 × 45 =
  21. 21.125 × 12 =
  22. 22.40 × 35 =
  23. 23.26 × 25 =
  24. 24.16 × 125 =
  25. 25.28 × 75 =
  26. 26.65 × 30 =
  27. 27.65 × 40 =
  28. 28.26 × 75 =
  29. 29.35 × 14 =
  30. 30.30 × 35 =
  31. 31.38 × 25 =
  32. 32.14 × 35 =
  33. 33.30 × 75 =
  34. 34.45 × 18 =
  35. 35.125 × 38 =
  36. 36.25 × 24 =
  37. 37.125 × 16 =
  38. 38.40 × 15 =
  39. 39.55 × 34 =
  40. 40.25 × 12 =

Answer key

  1. 3750
  2. 2600
  3. 1170
  4. 1320
  5. 250
  6. 300
  7. 300
  8. 540
  9. 270
  10. 150
  11. 770
  12. 90
  13. 1440
  14. 150
  15. 1430
  16. 400
  17. 1350
  18. 910
  19. 1320
  20. 1080
  21. 1500
  22. 1400
  23. 650
  24. 2000
  25. 2100
  26. 1950
  27. 2600
  28. 1950
  29. 490
  30. 1050
  31. 950
  32. 490
  33. 2250
  34. 810
  35. 4750
  36. 600
  37. 2000
  38. 600
  39. 1870
  40. 300

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