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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 73 · 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. 1.87 × 50 =
  2. 2.77 × 5 =
  3. 3.58 × 50 =
  4. 4.53 × 5 =
  5. 5.58 × 50 =
  6. 6.87 × 5 =
  7. 7.93 × 5 =
  8. 8.42 × 5 =
  9. 9.51 × 5 =
  10. 10.49 × 5 =
  11. 11.39 × 50 =
  12. 12.79 × 5 =
  13. 13.25 × 5 =
  14. 14.31 × 5 =
  15. 15.97 × 50 =
  16. 16.28 × 50 =
  17. 17.55 × 50 =
  18. 18.53 × 5 =
  19. 19.40 × 50 =
  20. 20.27 × 5 =
  21. 21.45 × 50 =
  22. 22.67 × 5 =
  23. 23.41 × 5 =
  24. 24.46 × 5 =
  25. 25.80 × 50 =
  26. 26.59 × 50 =
  27. 27.28 × 50 =
  28. 28.23 × 5 =
  29. 29.91 × 50 =
  30. 30.35 × 50 =
  31. 31.89 × 50 =
  32. 32.20 × 50 =
  33. 33.55 × 50 =
  34. 34.39 × 5 =
  35. 35.93 × 5 =
  36. 36.80 × 50 =
  37. 37.14 × 5 =
  38. 38.66 × 50 =
  39. 39.88 × 50 =
  40. 40.27 × 50 =

Answer key

  1. 4350
  2. 385
  3. 2900
  4. 265
  5. 2900
  6. 435
  7. 465
  8. 210
  9. 255
  10. 245
  11. 1950
  12. 395
  13. 125
  14. 155
  15. 4850
  16. 1400
  17. 2750
  18. 265
  19. 2000
  20. 135
  21. 2250
  22. 335
  23. 205
  24. 230
  25. 4000
  26. 2950
  27. 1400
  28. 115
  29. 4550
  30. 1750
  31. 4450
  32. 1000
  33. 2750
  34. 195
  35. 465
  36. 4000
  37. 70
  38. 3300
  39. 4400
  40. 1350

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