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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 886 · 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. 1.15 × 14 =
  2. 2.40 × 45 =
  3. 3.15 × 28 =
  4. 4.18 × 75 =
  5. 5.6 × 125 =
  6. 6.12 × 55 =
  7. 7.18 × 35 =
  8. 8.6 × 65 =
  9. 9.36 × 15 =
  10. 10.25 × 6 =
  11. 11.65 × 12 =
  12. 12.65 × 22 =
  13. 13.125 × 32 =
  14. 14.24 × 35 =
  15. 15.16 × 75 =
  16. 16.65 × 22 =
  17. 17.32 × 125 =
  18. 18.40 × 45 =
  19. 19.38 × 15 =
  20. 20.12 × 15 =
  21. 21.35 × 10 =
  22. 22.75 × 10 =
  23. 23.55 × 28 =
  24. 24.24 × 65 =
  25. 25.18 × 75 =
  26. 26.20 × 25 =
  27. 27.26 × 65 =
  28. 28.125 × 12 =
  29. 29.55 × 24 =
  30. 30.12 × 45 =
  31. 31.40 × 75 =
  32. 32.65 × 10 =
  33. 33.45 × 10 =
  34. 34.45 × 18 =
  35. 35.22 × 125 =
  36. 36.38 × 15 =
  37. 37.36 × 15 =
  38. 38.28 × 25 =
  39. 39.32 × 45 =
  40. 40.25 × 8 =

Answer key

  1. 210
  2. 1800
  3. 420
  4. 1350
  5. 750
  6. 660
  7. 630
  8. 390
  9. 540
  10. 150
  11. 780
  12. 1430
  13. 4000
  14. 840
  15. 1200
  16. 1430
  17. 4000
  18. 1800
  19. 570
  20. 180
  21. 350
  22. 750
  23. 1540
  24. 1560
  25. 1350
  26. 500
  27. 1690
  28. 1500
  29. 1320
  30. 540
  31. 3000
  32. 650
  33. 450
  34. 810
  35. 2750
  36. 570
  37. 540
  38. 700
  39. 1440
  40. 200

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