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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 609 · 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. 1.89 × 5 =
  2. 2.54 × 5 =
  3. 3.96 × 5 =
  4. 4.98 × 50 =
  5. 5.51 × 50 =
  6. 6.17 × 5 =
  7. 7.78 × 50 =
  8. 8.83 × 50 =
  9. 9.52 × 50 =
  10. 10.95 × 5 =
  11. 11.57 × 5 =
  12. 12.62 × 5 =
  13. 13.23 × 5 =
  14. 14.22 × 5 =
  15. 15.66 × 5 =
  16. 16.51 × 50 =
  17. 17.60 × 5 =
  18. 18.79 × 50 =
  19. 19.18 × 5 =
  20. 20.56 × 5 =
  21. 21.53 × 5 =
  22. 22.15 × 50 =
  23. 23.48 × 50 =
  24. 24.80 × 50 =
  25. 25.71 × 50 =
  26. 26.19 × 5 =
  27. 27.73 × 5 =
  28. 28.59 × 50 =
  29. 29.47 × 5 =
  30. 30.50 × 50 =
  31. 31.76 × 5 =
  32. 32.19 × 5 =
  33. 33.42 × 50 =
  34. 34.48 × 50 =
  35. 35.96 × 50 =
  36. 36.85 × 5 =
  37. 37.24 × 50 =
  38. 38.29 × 5 =
  39. 39.50 × 50 =
  40. 40.77 × 5 =

Answer key

  1. 445
  2. 270
  3. 480
  4. 4900
  5. 2550
  6. 85
  7. 3900
  8. 4150
  9. 2600
  10. 475
  11. 285
  12. 310
  13. 115
  14. 110
  15. 330
  16. 2550
  17. 300
  18. 3950
  19. 90
  20. 280
  21. 265
  22. 750
  23. 2400
  24. 4000
  25. 3550
  26. 95
  27. 365
  28. 2950
  29. 235
  30. 2500
  31. 380
  32. 95
  33. 2100
  34. 2400
  35. 4800
  36. 425
  37. 1200
  38. 145
  39. 2500
  40. 385

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