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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 937 · 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 × 25 =
  2. 2.26 × 15 =
  3. 3.35 × 22 =
  4. 4.36 × 65 =
  5. 5.26 × 25 =
  6. 6.35 × 24 =
  7. 7.36 × 55 =
  8. 8.30 × 45 =
  9. 9.10 × 65 =
  10. 10.15 × 14 =
  11. 11.10 × 35 =
  12. 12.12 × 15 =
  13. 13.35 × 36 =
  14. 14.65 × 10 =
  15. 15.125 × 34 =
  16. 16.8 × 125 =
  17. 17.34 × 45 =
  18. 18.35 × 26 =
  19. 19.8 × 55 =
  20. 20.35 × 20 =
  21. 21.15 × 32 =
  22. 22.15 × 24 =
  23. 23.35 × 22 =
  24. 24.12 × 25 =
  25. 25.45 × 18 =
  26. 26.45 × 30 =
  27. 27.6 × 25 =
  28. 28.8 × 65 =
  29. 29.8 × 35 =
  30. 30.16 × 75 =
  31. 31.14 × 35 =
  32. 32.15 × 14 =
  33. 33.28 × 45 =
  34. 34.75 × 10 =
  35. 35.34 × 65 =
  36. 36.75 × 30 =
  37. 37.75 × 24 =
  38. 38.34 × 45 =
  39. 39.26 × 125 =
  40. 40.75 × 30 =

Answer key

  1. 700
  2. 390
  3. 770
  4. 2340
  5. 650
  6. 840
  7. 1980
  8. 1350
  9. 650
  10. 210
  11. 350
  12. 180
  13. 1260
  14. 650
  15. 4250
  16. 1000
  17. 1530
  18. 910
  19. 440
  20. 700
  21. 480
  22. 360
  23. 770
  24. 300
  25. 810
  26. 1350
  27. 150
  28. 520
  29. 280
  30. 1200
  31. 490
  32. 210
  33. 1260
  34. 750
  35. 2210
  36. 2250
  37. 1800
  38. 1530
  39. 3250
  40. 2250

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