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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 620 · 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. 1.25 × 30 =
  2. 2.65 × 20 =
  3. 3.55 × 26 =
  4. 4.45 × 12 =
  5. 5.15 × 30 =
  6. 6.34 × 25 =
  7. 7.38 × 125 =
  8. 8.75 × 14 =
  9. 9.25 × 8 =
  10. 10.55 × 38 =
  11. 11.15 × 36 =
  12. 12.14 × 55 =
  13. 13.40 × 75 =
  14. 14.15 × 20 =
  15. 15.38 × 35 =
  16. 16.18 × 45 =
  17. 17.45 × 10 =
  18. 18.12 × 125 =
  19. 19.75 × 14 =
  20. 20.35 × 28 =
  21. 21.35 × 14 =
  22. 22.26 × 55 =
  23. 23.55 × 40 =
  24. 24.25 × 8 =
  25. 25.14 × 45 =
  26. 26.28 × 25 =
  27. 27.20 × 15 =
  28. 28.45 × 28 =
  29. 29.75 × 20 =
  30. 30.24 × 65 =
  31. 31.16 × 125 =
  32. 32.45 × 28 =
  33. 33.35 × 8 =
  34. 34.65 × 6 =
  35. 35.75 × 14 =
  36. 36.45 × 8 =
  37. 37.14 × 65 =
  38. 38.36 × 35 =
  39. 39.20 × 35 =
  40. 40.28 × 75 =

Answer key

  1. 750
  2. 1300
  3. 1430
  4. 540
  5. 450
  6. 850
  7. 4750
  8. 1050
  9. 200
  10. 2090
  11. 540
  12. 770
  13. 3000
  14. 300
  15. 1330
  16. 810
  17. 450
  18. 1500
  19. 1050
  20. 980
  21. 490
  22. 1430
  23. 2200
  24. 200
  25. 630
  26. 700
  27. 300
  28. 1260
  29. 1500
  30. 1560
  31. 2000
  32. 1260
  33. 280
  34. 390
  35. 1050
  36. 360
  37. 910
  38. 1260
  39. 700
  40. 2100

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