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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 847 · 40 questions
TalentJR

The fast method (Halve first): Halve the number. × 5: multiply the half by 10. × 50: multiply the half by 100. Odd number? Its half ends in .5 — 43 → 21.5 — and × 10 moves the point: 215.

NameDateTime takenScore ___ / 40
  1. 1.36 × 5 =
  2. 2.47 × 5 =
  3. 3.49 × 50 =
  4. 4.22 × 5 =
  5. 5.70 × 50 =
  6. 6.42 × 50 =
  7. 7.64 × 50 =
  8. 8.12 × 50 =
  9. 9.93 × 50 =
  10. 10.36 × 5 =
  11. 11.14 × 50 =
  12. 12.13 × 50 =
  13. 13.59 × 5 =
  14. 14.66 × 50 =
  15. 15.98 × 50 =
  16. 16.51 × 5 =
  17. 17.47 × 5 =
  18. 18.89 × 50 =
  19. 19.79 × 5 =
  20. 20.90 × 50 =
  21. 21.96 × 50 =
  22. 22.62 × 5 =
  23. 23.80 × 50 =
  24. 24.33 × 5 =
  25. 25.26 × 5 =
  26. 26.24 × 5 =
  27. 27.23 × 5 =
  28. 28.19 × 5 =
  29. 29.46 × 50 =
  30. 30.85 × 5 =
  31. 31.83 × 50 =
  32. 32.76 × 50 =
  33. 33.85 × 5 =
  34. 34.34 × 5 =
  35. 35.95 × 50 =
  36. 36.23 × 5 =
  37. 37.76 × 5 =
  38. 38.81 × 5 =
  39. 39.71 × 5 =
  40. 40.29 × 50 =

Answer key

  1. 180
  2. 235
  3. 2450
  4. 110
  5. 3500
  6. 2100
  7. 3200
  8. 600
  9. 4650
  10. 180
  11. 700
  12. 650
  13. 295
  14. 3300
  15. 4900
  16. 255
  17. 235
  18. 4450
  19. 395
  20. 4500
  21. 4800
  22. 310
  23. 4000
  24. 165
  25. 130
  26. 120
  27. 115
  28. 95
  29. 2300
  30. 425
  31. 4150
  32. 3800
  33. 425
  34. 170
  35. 4750
  36. 115
  37. 380
  38. 405
  39. 355
  40. 1450

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