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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 93 · 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. 1.30 × 35 =
  2. 2.25 × 40 =
  3. 3.15 × 36 =
  4. 4.25 × 34 =
  5. 5.15 × 30 =
  6. 6.45 × 16 =
  7. 7.30 × 15 =
  8. 8.75 × 14 =
  9. 9.8 × 15 =
  10. 10.125 × 34 =
  11. 11.22 × 35 =
  12. 12.25 × 30 =
  13. 13.8 × 25 =
  14. 14.30 × 45 =
  15. 15.15 × 38 =
  16. 16.15 × 22 =
  17. 17.55 × 40 =
  18. 18.15 × 24 =
  19. 19.12 × 45 =
  20. 20.65 × 26 =
  21. 21.35 × 28 =
  22. 22.65 × 16 =
  23. 23.28 × 65 =
  24. 24.10 × 125 =
  25. 25.75 × 40 =
  26. 26.55 × 24 =
  27. 27.10 × 25 =
  28. 28.22 × 65 =
  29. 29.34 × 15 =
  30. 30.35 × 8 =
  31. 31.125 × 40 =
  32. 32.55 × 8 =
  33. 33.65 × 16 =
  34. 34.8 × 45 =
  35. 35.8 × 25 =
  36. 36.45 × 18 =
  37. 37.30 × 75 =
  38. 38.15 × 6 =
  39. 39.45 × 8 =
  40. 40.36 × 55 =

Answer key

  1. 1050
  2. 1000
  3. 540
  4. 850
  5. 450
  6. 720
  7. 450
  8. 1050
  9. 120
  10. 4250
  11. 770
  12. 750
  13. 200
  14. 1350
  15. 570
  16. 330
  17. 2200
  18. 360
  19. 540
  20. 1690
  21. 980
  22. 1040
  23. 1820
  24. 1250
  25. 3000
  26. 1320
  27. 250
  28. 1430
  29. 510
  30. 280
  31. 5000
  32. 440
  33. 1040
  34. 360
  35. 200
  36. 810
  37. 2250
  38. 90
  39. 360
  40. 1980

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