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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 121 · 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. 1.56 × 50 =
  2. 2.85 × 5 =
  3. 3.53 × 5 =
  4. 4.26 × 5 =
  5. 5.61 × 50 =
  6. 6.28 × 50 =
  7. 7.13 × 50 =
  8. 8.59 × 50 =
  9. 9.21 × 5 =
  10. 10.32 × 5 =
  11. 11.60 × 5 =
  12. 12.57 × 5 =
  13. 13.84 × 5 =
  14. 14.34 × 50 =
  15. 15.49 × 50 =
  16. 16.45 × 50 =
  17. 17.63 × 50 =
  18. 18.64 × 50 =
  19. 19.24 × 50 =
  20. 20.43 × 50 =
  21. 21.62 × 5 =
  22. 22.53 × 5 =
  23. 23.17 × 5 =
  24. 24.57 × 50 =
  25. 25.51 × 50 =
  26. 26.42 × 5 =
  27. 27.51 × 50 =
  28. 28.89 × 50 =
  29. 29.38 × 50 =
  30. 30.92 × 50 =
  31. 31.12 × 5 =
  32. 32.21 × 50 =
  33. 33.60 × 50 =
  34. 34.40 × 5 =
  35. 35.68 × 5 =
  36. 36.38 × 5 =
  37. 37.54 × 50 =
  38. 38.96 × 5 =
  39. 39.14 × 5 =
  40. 40.84 × 50 =

Answer key

  1. 2800
  2. 425
  3. 265
  4. 130
  5. 3050
  6. 1400
  7. 650
  8. 2950
  9. 105
  10. 160
  11. 300
  12. 285
  13. 420
  14. 1700
  15. 2450
  16. 2250
  17. 3150
  18. 3200
  19. 1200
  20. 2150
  21. 310
  22. 265
  23. 85
  24. 2850
  25. 2550
  26. 210
  27. 2550
  28. 4450
  29. 1900
  30. 4600
  31. 60
  32. 1050
  33. 3000
  34. 200
  35. 340
  36. 190
  37. 2700
  38. 480
  39. 70
  40. 4200

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