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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 516 · 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 × 28 =
  2. 2.45 × 34 =
  3. 3.12 × 15 =
  4. 4.75 × 12 =
  5. 5.20 × 25 =
  6. 6.36 × 65 =
  7. 7.18 × 25 =
  8. 8.14 × 45 =
  9. 9.38 × 25 =
  10. 10.65 × 20 =
  11. 11.45 × 14 =
  12. 12.12 × 65 =
  13. 13.28 × 45 =
  14. 14.8 × 65 =
  15. 15.20 × 55 =
  16. 16.45 × 10 =
  17. 17.75 × 10 =
  18. 18.26 × 75 =
  19. 19.55 × 20 =
  20. 20.18 × 25 =
  21. 21.25 × 8 =
  22. 22.22 × 15 =
  23. 23.65 × 26 =
  24. 24.35 × 18 =
  25. 25.25 × 18 =
  26. 26.38 × 25 =
  27. 27.14 × 75 =
  28. 28.35 × 10 =
  29. 29.25 × 28 =
  30. 30.26 × 35 =
  31. 31.65 × 26 =
  32. 32.45 × 20 =
  33. 33.15 × 24 =
  34. 34.65 × 24 =
  35. 35.75 × 16 =
  36. 36.8 × 75 =
  37. 37.8 × 55 =
  38. 38.25 × 10 =
  39. 39.35 × 8 =
  40. 40.26 × 125 =

Answer key

  1. 2100
  2. 1530
  3. 180
  4. 900
  5. 500
  6. 2340
  7. 450
  8. 630
  9. 950
  10. 1300
  11. 630
  12. 780
  13. 1260
  14. 520
  15. 1100
  16. 450
  17. 750
  18. 1950
  19. 1100
  20. 450
  21. 200
  22. 330
  23. 1690
  24. 630
  25. 450
  26. 950
  27. 1050
  28. 350
  29. 700
  30. 910
  31. 1690
  32. 900
  33. 360
  34. 1560
  35. 1200
  36. 600
  37. 440
  38. 250
  39. 280
  40. 3250

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