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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 772 · 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. 1.6 × 15 =
  2. 2.25 × 30 =
  3. 3.35 × 14 =
  4. 4.30 × 75 =
  5. 5.18 × 35 =
  6. 6.8 × 15 =
  7. 7.16 × 45 =
  8. 8.15 × 26 =
  9. 9.18 × 65 =
  10. 10.75 × 36 =
  11. 11.36 × 55 =
  12. 12.75 × 38 =
  13. 13.65 × 30 =
  14. 14.6 × 75 =
  15. 15.65 × 36 =
  16. 16.18 × 35 =
  17. 17.24 × 45 =
  18. 18.28 × 125 =
  19. 19.36 × 15 =
  20. 20.14 × 45 =
  21. 21.24 × 45 =
  22. 22.32 × 125 =
  23. 23.15 × 18 =
  24. 24.10 × 65 =
  25. 25.125 × 12 =
  26. 26.34 × 65 =
  27. 27.16 × 25 =
  28. 28.35 × 14 =
  29. 29.125 × 34 =
  30. 30.65 × 14 =
  31. 31.14 × 45 =
  32. 32.55 × 8 =
  33. 33.45 × 8 =
  34. 34.15 × 36 =
  35. 35.26 × 35 =
  36. 36.25 × 10 =
  37. 37.75 × 32 =
  38. 38.38 × 15 =
  39. 39.6 × 125 =
  40. 40.75 × 28 =

Answer key

  1. 90
  2. 750
  3. 490
  4. 2250
  5. 630
  6. 120
  7. 720
  8. 390
  9. 1170
  10. 2700
  11. 1980
  12. 2850
  13. 1950
  14. 450
  15. 2340
  16. 630
  17. 1080
  18. 3500
  19. 540
  20. 630
  21. 1080
  22. 4000
  23. 270
  24. 650
  25. 1500
  26. 2210
  27. 400
  28. 490
  29. 4250
  30. 910
  31. 630
  32. 440
  33. 360
  34. 540
  35. 910
  36. 250
  37. 2400
  38. 570
  39. 750
  40. 2100

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