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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 577 · 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. 1.22 × 125 =
  2. 2.65 × 16 =
  3. 3.8 × 15 =
  4. 4.24 × 45 =
  5. 5.18 × 75 =
  6. 6.125 × 26 =
  7. 7.24 × 15 =
  8. 8.55 × 8 =
  9. 9.65 × 8 =
  10. 10.36 × 55 =
  11. 11.30 × 25 =
  12. 12.75 × 32 =
  13. 13.20 × 15 =
  14. 14.22 × 15 =
  15. 15.16 × 65 =
  16. 16.10 × 15 =
  17. 17.8 × 55 =
  18. 18.65 × 36 =
  19. 19.15 × 40 =
  20. 20.8 × 25 =
  21. 21.14 × 25 =
  22. 22.125 × 6 =
  23. 23.35 × 34 =
  24. 24.65 × 20 =
  25. 25.38 × 35 =
  26. 26.15 × 34 =
  27. 27.125 × 20 =
  28. 28.125 × 26 =
  29. 29.55 × 12 =
  30. 30.32 × 125 =
  31. 31.35 × 24 =
  32. 32.20 × 65 =
  33. 33.26 × 55 =
  34. 34.15 × 34 =
  35. 35.75 × 40 =
  36. 36.125 × 12 =
  37. 37.15 × 26 =
  38. 38.32 × 25 =
  39. 39.55 × 18 =
  40. 40.6 × 65 =

Answer key

  1. 2750
  2. 1040
  3. 120
  4. 1080
  5. 1350
  6. 3250
  7. 360
  8. 440
  9. 520
  10. 1980
  11. 750
  12. 2400
  13. 300
  14. 330
  15. 1040
  16. 150
  17. 440
  18. 2340
  19. 600
  20. 200
  21. 350
  22. 750
  23. 1190
  24. 1300
  25. 1330
  26. 510
  27. 2500
  28. 3250
  29. 660
  30. 4000
  31. 840
  32. 1300
  33. 1430
  34. 510
  35. 3000
  36. 1500
  37. 390
  38. 800
  39. 990
  40. 390

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