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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 129 · 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. 1.125 × 34 =
  2. 2.125 × 20 =
  3. 3.45 × 30 =
  4. 4.8 × 55 =
  5. 5.34 × 15 =
  6. 6.125 × 36 =
  7. 7.55 × 22 =
  8. 8.6 × 15 =
  9. 9.18 × 65 =
  10. 10.10 × 35 =
  11. 11.45 × 16 =
  12. 12.15 × 34 =
  13. 13.6 × 25 =
  14. 14.75 × 16 =
  15. 15.6 × 35 =
  16. 16.36 × 25 =
  17. 17.24 × 15 =
  18. 18.45 × 6 =
  19. 19.45 × 34 =
  20. 20.18 × 75 =
  21. 21.15 × 26 =
  22. 22.28 × 125 =
  23. 23.16 × 125 =
  24. 24.12 × 35 =
  25. 25.65 × 18 =
  26. 26.38 × 15 =
  27. 27.65 × 18 =
  28. 28.26 × 65 =
  29. 29.55 × 40 =
  30. 30.65 × 10 =
  31. 31.55 × 22 =
  32. 32.28 × 75 =
  33. 33.125 × 28 =
  34. 34.36 × 45 =
  35. 35.35 × 24 =
  36. 36.35 × 6 =
  37. 37.30 × 65 =
  38. 38.75 × 8 =
  39. 39.75 × 26 =
  40. 40.75 × 14 =

Answer key

  1. 4250
  2. 2500
  3. 1350
  4. 440
  5. 510
  6. 4500
  7. 1210
  8. 90
  9. 1170
  10. 350
  11. 720
  12. 510
  13. 150
  14. 1200
  15. 210
  16. 900
  17. 360
  18. 270
  19. 1530
  20. 1350
  21. 390
  22. 3500
  23. 2000
  24. 420
  25. 1170
  26. 570
  27. 1170
  28. 1690
  29. 2200
  30. 650
  31. 1210
  32. 2100
  33. 3500
  34. 1620
  35. 840
  36. 210
  37. 1950
  38. 600
  39. 1950
  40. 1050

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