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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 445 · 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. 1.75 × 26 =
  2. 2.34 × 65 =
  3. 3.125 × 18 =
  4. 4.32 × 45 =
  5. 5.15 × 24 =
  6. 6.32 × 45 =
  7. 7.25 × 14 =
  8. 8.26 × 25 =
  9. 9.25 × 34 =
  10. 10.75 × 10 =
  11. 11.8 × 15 =
  12. 12.14 × 125 =
  13. 13.32 × 15 =
  14. 14.125 × 38 =
  15. 15.38 × 15 =
  16. 16.35 × 14 =
  17. 17.38 × 15 =
  18. 18.10 × 25 =
  19. 19.45 × 26 =
  20. 20.65 × 20 =
  21. 21.22 × 45 =
  22. 22.75 × 18 =
  23. 23.8 × 35 =
  24. 24.30 × 35 =
  25. 25.30 × 15 =
  26. 26.125 × 20 =
  27. 27.35 × 30 =
  28. 28.14 × 125 =
  29. 29.25 × 6 =
  30. 30.14 × 25 =
  31. 31.35 × 22 =
  32. 32.40 × 35 =
  33. 33.20 × 15 =
  34. 34.15 × 8 =
  35. 35.28 × 75 =
  36. 36.24 × 65 =
  37. 37.36 × 25 =
  38. 38.16 × 65 =
  39. 39.18 × 35 =
  40. 40.15 × 12 =

Answer key

  1. 1950
  2. 2210
  3. 2250
  4. 1440
  5. 360
  6. 1440
  7. 350
  8. 650
  9. 850
  10. 750
  11. 120
  12. 1750
  13. 480
  14. 4750
  15. 570
  16. 490
  17. 570
  18. 250
  19. 1170
  20. 1300
  21. 990
  22. 1350
  23. 280
  24. 1050
  25. 450
  26. 2500
  27. 1050
  28. 1750
  29. 150
  30. 350
  31. 770
  32. 1400
  33. 300
  34. 120
  35. 2100
  36. 1560
  37. 900
  38. 1040
  39. 630
  40. 180

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