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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 401 · 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. 1.46 × 5 =
  2. 2.75 × 50 =
  3. 3.51 × 50 =
  4. 4.90 × 50 =
  5. 5.70 × 50 =
  6. 6.89 × 5 =
  7. 7.13 × 50 =
  8. 8.54 × 5 =
  9. 9.46 × 5 =
  10. 10.23 × 50 =
  11. 11.73 × 5 =
  12. 12.74 × 5 =
  13. 13.54 × 50 =
  14. 14.48 × 5 =
  15. 15.27 × 50 =
  16. 16.31 × 5 =
  17. 17.37 × 5 =
  18. 18.63 × 50 =
  19. 19.20 × 50 =
  20. 20.86 × 5 =
  21. 21.76 × 5 =
  22. 22.98 × 50 =
  23. 23.87 × 50 =
  24. 24.25 × 5 =
  25. 25.20 × 50 =
  26. 26.56 × 50 =
  27. 27.13 × 5 =
  28. 28.69 × 5 =
  29. 29.65 × 50 =
  30. 30.95 × 50 =
  31. 31.90 × 5 =
  32. 32.29 × 5 =
  33. 33.45 × 50 =
  34. 34.43 × 50 =
  35. 35.48 × 5 =
  36. 36.48 × 5 =
  37. 37.61 × 50 =
  38. 38.42 × 5 =
  39. 39.88 × 50 =
  40. 40.20 × 50 =

Answer key

  1. 230
  2. 3750
  3. 2550
  4. 4500
  5. 3500
  6. 445
  7. 650
  8. 270
  9. 230
  10. 1150
  11. 365
  12. 370
  13. 2700
  14. 240
  15. 1350
  16. 155
  17. 185
  18. 3150
  19. 1000
  20. 430
  21. 380
  22. 4900
  23. 4350
  24. 125
  25. 1000
  26. 2800
  27. 65
  28. 345
  29. 3250
  30. 4750
  31. 450
  32. 145
  33. 2250
  34. 2150
  35. 240
  36. 240
  37. 3050
  38. 210
  39. 4400
  40. 1000

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