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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 613 · 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. 1.21 × 5 =
  2. 2.98 × 50 =
  3. 3.50 × 50 =
  4. 4.35 × 5 =
  5. 5.40 × 50 =
  6. 6.26 × 5 =
  7. 7.26 × 5 =
  8. 8.72 × 50 =
  9. 9.20 × 5 =
  10. 10.37 × 5 =
  11. 11.69 × 5 =
  12. 12.57 × 5 =
  13. 13.31 × 5 =
  14. 14.28 × 5 =
  15. 15.95 × 50 =
  16. 16.84 × 5 =
  17. 17.95 × 50 =
  18. 18.58 × 5 =
  19. 19.49 × 5 =
  20. 20.27 × 5 =
  21. 21.32 × 50 =
  22. 22.47 × 5 =
  23. 23.15 × 5 =
  24. 24.39 × 50 =
  25. 25.14 × 5 =
  26. 26.28 × 5 =
  27. 27.86 × 50 =
  28. 28.15 × 50 =
  29. 29.15 × 50 =
  30. 30.69 × 5 =
  31. 31.73 × 5 =
  32. 32.21 × 5 =
  33. 33.60 × 50 =
  34. 34.91 × 50 =
  35. 35.52 × 5 =
  36. 36.77 × 50 =
  37. 37.17 × 5 =
  38. 38.30 × 50 =
  39. 39.34 × 5 =
  40. 40.30 × 5 =

Answer key

  1. 105
  2. 4900
  3. 2500
  4. 175
  5. 2000
  6. 130
  7. 130
  8. 3600
  9. 100
  10. 185
  11. 345
  12. 285
  13. 155
  14. 140
  15. 4750
  16. 420
  17. 4750
  18. 290
  19. 245
  20. 135
  21. 1600
  22. 235
  23. 75
  24. 1950
  25. 70
  26. 140
  27. 4300
  28. 750
  29. 750
  30. 345
  31. 365
  32. 105
  33. 3000
  34. 4550
  35. 260
  36. 3850
  37. 85
  38. 1500
  39. 170
  40. 150

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