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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 981 · 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. 1.55 × 14 =
  2. 2.38 × 25 =
  3. 3.55 × 8 =
  4. 4.10 × 65 =
  5. 5.45 × 30 =
  6. 6.45 × 40 =
  7. 7.65 × 22 =
  8. 8.6 × 45 =
  9. 9.18 × 55 =
  10. 10.45 × 10 =
  11. 11.35 × 26 =
  12. 12.65 × 30 =
  13. 13.35 × 12 =
  14. 14.30 × 15 =
  15. 15.75 × 40 =
  16. 16.75 × 28 =
  17. 17.20 × 125 =
  18. 18.6 × 25 =
  19. 19.36 × 15 =
  20. 20.15 × 14 =
  21. 21.28 × 125 =
  22. 22.6 × 35 =
  23. 23.18 × 125 =
  24. 24.125 × 26 =
  25. 25.24 × 15 =
  26. 26.36 × 35 =
  27. 27.24 × 55 =
  28. 28.18 × 65 =
  29. 29.45 × 30 =
  30. 30.40 × 15 =
  31. 31.22 × 65 =
  32. 32.34 × 25 =
  33. 33.26 × 125 =
  34. 34.45 × 6 =
  35. 35.15 × 36 =
  36. 36.55 × 10 =
  37. 37.34 × 15 =
  38. 38.45 × 8 =
  39. 39.40 × 125 =
  40. 40.24 × 55 =

Answer key

  1. 770
  2. 950
  3. 440
  4. 650
  5. 1350
  6. 1800
  7. 1430
  8. 270
  9. 990
  10. 450
  11. 910
  12. 1950
  13. 420
  14. 450
  15. 3000
  16. 2100
  17. 2500
  18. 150
  19. 540
  20. 210
  21. 3500
  22. 210
  23. 2250
  24. 3250
  25. 360
  26. 1260
  27. 1320
  28. 1170
  29. 1350
  30. 600
  31. 1430
  32. 850
  33. 3250
  34. 270
  35. 540
  36. 550
  37. 510
  38. 360
  39. 5000
  40. 1320

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