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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 929 · 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. 1.16 × 35 =
  2. 2.15 × 6 =
  3. 3.65 × 26 =
  4. 4.12 × 55 =
  5. 5.15 × 8 =
  6. 6.15 × 34 =
  7. 7.75 × 40 =
  8. 8.18 × 15 =
  9. 9.15 × 14 =
  10. 10.75 × 18 =
  11. 11.34 × 65 =
  12. 12.38 × 45 =
  13. 13.45 × 14 =
  14. 14.36 × 15 =
  15. 15.12 × 15 =
  16. 16.75 × 36 =
  17. 17.36 × 35 =
  18. 18.65 × 8 =
  19. 19.8 × 65 =
  20. 20.55 × 18 =
  21. 21.125 × 24 =
  22. 22.45 × 8 =
  23. 23.14 × 25 =
  24. 24.55 × 22 =
  25. 25.14 × 125 =
  26. 26.45 × 12 =
  27. 27.18 × 45 =
  28. 28.12 × 15 =
  29. 29.125 × 18 =
  30. 30.10 × 125 =
  31. 31.35 × 24 =
  32. 32.45 × 30 =
  33. 33.35 × 24 =
  34. 34.25 × 26 =
  35. 35.6 × 25 =
  36. 36.20 × 15 =
  37. 37.55 × 18 =
  38. 38.10 × 25 =
  39. 39.15 × 12 =
  40. 40.65 × 30 =

Answer key

  1. 560
  2. 90
  3. 1690
  4. 660
  5. 120
  6. 510
  7. 3000
  8. 270
  9. 210
  10. 1350
  11. 2210
  12. 1710
  13. 630
  14. 540
  15. 180
  16. 2700
  17. 1260
  18. 520
  19. 520
  20. 990
  21. 3000
  22. 360
  23. 350
  24. 1210
  25. 1750
  26. 540
  27. 810
  28. 180
  29. 2250
  30. 1250
  31. 840
  32. 1350
  33. 840
  34. 650
  35. 150
  36. 300
  37. 990
  38. 250
  39. 180
  40. 1950

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