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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 575 · 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. 1.77 × 5 =
  2. 2.60 × 50 =
  3. 3.14 × 5 =
  4. 4.23 × 5 =
  5. 5.25 × 5 =
  6. 6.96 × 50 =
  7. 7.97 × 5 =
  8. 8.53 × 5 =
  9. 9.35 × 5 =
  10. 10.94 × 5 =
  11. 11.24 × 5 =
  12. 12.72 × 50 =
  13. 13.74 × 5 =
  14. 14.47 × 5 =
  15. 15.65 × 5 =
  16. 16.51 × 50 =
  17. 17.72 × 50 =
  18. 18.79 × 5 =
  19. 19.25 × 5 =
  20. 20.31 × 5 =
  21. 21.49 × 5 =
  22. 22.58 × 5 =
  23. 23.92 × 5 =
  24. 24.13 × 5 =
  25. 25.95 × 50 =
  26. 26.65 × 50 =
  27. 27.22 × 50 =
  28. 28.19 × 5 =
  29. 29.32 × 50 =
  30. 30.53 × 5 =
  31. 31.38 × 50 =
  32. 32.80 × 5 =
  33. 33.34 × 50 =
  34. 34.95 × 5 =
  35. 35.43 × 50 =
  36. 36.85 × 5 =
  37. 37.60 × 50 =
  38. 38.28 × 50 =
  39. 39.87 × 5 =
  40. 40.23 × 5 =

Answer key

  1. 385
  2. 3000
  3. 70
  4. 115
  5. 125
  6. 4800
  7. 485
  8. 265
  9. 175
  10. 470
  11. 120
  12. 3600
  13. 370
  14. 235
  15. 325
  16. 2550
  17. 3600
  18. 395
  19. 125
  20. 155
  21. 245
  22. 290
  23. 460
  24. 65
  25. 4750
  26. 3250
  27. 1100
  28. 95
  29. 1600
  30. 265
  31. 1900
  32. 400
  33. 1700
  34. 475
  35. 2150
  36. 425
  37. 3000
  38. 1400
  39. 435
  40. 115

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