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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 44 · 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. 1.28 × 75 =
  2. 2.125 × 26 =
  3. 3.6 × 65 =
  4. 4.24 × 125 =
  5. 5.75 × 18 =
  6. 6.65 × 36 =
  7. 7.45 × 28 =
  8. 8.65 × 22 =
  9. 9.75 × 32 =
  10. 10.25 × 34 =
  11. 11.15 × 6 =
  12. 12.34 × 15 =
  13. 13.45 × 34 =
  14. 14.125 × 10 =
  15. 15.55 × 14 =
  16. 16.15 × 10 =
  17. 17.125 × 8 =
  18. 18.14 × 65 =
  19. 19.18 × 125 =
  20. 20.22 × 45 =
  21. 21.10 × 35 =
  22. 22.125 × 16 =
  23. 23.25 × 38 =
  24. 24.16 × 75 =
  25. 25.12 × 25 =
  26. 26.75 × 34 =
  27. 27.32 × 125 =
  28. 28.35 × 6 =
  29. 29.20 × 125 =
  30. 30.6 × 25 =
  31. 31.18 × 15 =
  32. 32.15 × 14 =
  33. 33.20 × 25 =
  34. 34.75 × 10 =
  35. 35.15 × 12 =
  36. 36.8 × 45 =
  37. 37.6 × 55 =
  38. 38.6 × 55 =
  39. 39.15 × 8 =
  40. 40.36 × 35 =

Answer key

  1. 2100
  2. 3250
  3. 390
  4. 3000
  5. 1350
  6. 2340
  7. 1260
  8. 1430
  9. 2400
  10. 850
  11. 90
  12. 510
  13. 1530
  14. 1250
  15. 770
  16. 150
  17. 1000
  18. 910
  19. 2250
  20. 990
  21. 350
  22. 2000
  23. 950
  24. 1200
  25. 300
  26. 2550
  27. 4000
  28. 210
  29. 2500
  30. 150
  31. 270
  32. 210
  33. 500
  34. 750
  35. 180
  36. 360
  37. 330
  38. 330
  39. 120
  40. 1260

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