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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 943 · 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. 1.15 × 32 =
  2. 2.14 × 125 =
  3. 3.14 × 75 =
  4. 4.25 × 28 =
  5. 5.25 × 22 =
  6. 6.18 × 65 =
  7. 7.34 × 45 =
  8. 8.20 × 15 =
  9. 9.40 × 45 =
  10. 10.55 × 24 =
  11. 11.16 × 15 =
  12. 12.36 × 55 =
  13. 13.55 × 28 =
  14. 14.24 × 55 =
  15. 15.36 × 15 =
  16. 16.20 × 15 =
  17. 17.45 × 16 =
  18. 18.15 × 12 =
  19. 19.24 × 75 =
  20. 20.10 × 45 =
  21. 21.15 × 24 =
  22. 22.35 × 32 =
  23. 23.55 × 12 =
  24. 24.35 × 30 =
  25. 25.30 × 125 =
  26. 26.38 × 75 =
  27. 27.45 × 30 =
  28. 28.65 × 22 =
  29. 29.40 × 35 =
  30. 30.75 × 28 =
  31. 31.65 × 12 =
  32. 32.6 × 65 =
  33. 33.125 × 16 =
  34. 34.36 × 75 =
  35. 35.65 × 22 =
  36. 36.35 × 14 =
  37. 37.28 × 45 =
  38. 38.20 × 35 =
  39. 39.34 × 65 =
  40. 40.55 × 20 =

Answer key

  1. 480
  2. 1750
  3. 1050
  4. 700
  5. 550
  6. 1170
  7. 1530
  8. 300
  9. 1800
  10. 1320
  11. 240
  12. 1980
  13. 1540
  14. 1320
  15. 540
  16. 300
  17. 720
  18. 180
  19. 1800
  20. 450
  21. 360
  22. 1120
  23. 660
  24. 1050
  25. 3750
  26. 2850
  27. 1350
  28. 1430
  29. 1400
  30. 2100
  31. 780
  32. 390
  33. 2000
  34. 2700
  35. 1430
  36. 490
  37. 1260
  38. 700
  39. 2210
  40. 1100

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