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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 710 · 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. 1.28 × 15 =
  2. 2.10 × 15 =
  3. 3.55 × 18 =
  4. 4.14 × 25 =
  5. 5.34 × 25 =
  6. 6.18 × 15 =
  7. 7.65 × 40 =
  8. 8.25 × 16 =
  9. 9.18 × 45 =
  10. 10.10 × 15 =
  11. 11.65 × 16 =
  12. 12.25 × 38 =
  13. 13.16 × 75 =
  14. 14.8 × 15 =
  15. 15.25 × 26 =
  16. 16.32 × 55 =
  17. 17.35 × 14 =
  18. 18.45 × 36 =
  19. 19.15 × 8 =
  20. 20.35 × 38 =
  21. 21.125 × 14 =
  22. 22.16 × 25 =
  23. 23.125 × 38 =
  24. 24.40 × 15 =
  25. 25.18 × 65 =
  26. 26.30 × 75 =
  27. 27.36 × 35 =
  28. 28.36 × 125 =
  29. 29.8 × 25 =
  30. 30.125 × 12 =
  31. 31.125 × 12 =
  32. 32.125 × 20 =
  33. 33.15 × 34 =
  34. 34.22 × 15 =
  35. 35.15 × 36 =
  36. 36.35 × 18 =
  37. 37.20 × 35 =
  38. 38.125 × 20 =
  39. 39.14 × 15 =
  40. 40.15 × 18 =

Answer key

  1. 420
  2. 150
  3. 990
  4. 350
  5. 850
  6. 270
  7. 2600
  8. 400
  9. 810
  10. 150
  11. 1040
  12. 950
  13. 1200
  14. 120
  15. 650
  16. 1760
  17. 490
  18. 1620
  19. 120
  20. 1330
  21. 1750
  22. 400
  23. 4750
  24. 600
  25. 1170
  26. 2250
  27. 1260
  28. 4500
  29. 200
  30. 1500
  31. 1500
  32. 2500
  33. 510
  34. 330
  35. 540
  36. 630
  37. 700
  38. 2500
  39. 210
  40. 270

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