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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 688 · 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. 1.28 × 50 =
  2. 2.83 × 5 =
  3. 3.57 × 5 =
  4. 4.92 × 50 =
  5. 5.48 × 5 =
  6. 6.95 × 50 =
  7. 7.45 × 50 =
  8. 8.35 × 5 =
  9. 9.30 × 5 =
  10. 10.18 × 5 =
  11. 11.24 × 5 =
  12. 12.28 × 5 =
  13. 13.22 × 5 =
  14. 14.95 × 50 =
  15. 15.66 × 50 =
  16. 16.57 × 5 =
  17. 17.28 × 5 =
  18. 18.38 × 50 =
  19. 19.42 × 5 =
  20. 20.30 × 50 =
  21. 21.14 × 5 =
  22. 22.94 × 50 =
  23. 23.96 × 5 =
  24. 24.49 × 5 =
  25. 25.83 × 50 =
  26. 26.56 × 50 =
  27. 27.95 × 5 =
  28. 28.33 × 5 =
  29. 29.32 × 50 =
  30. 30.46 × 5 =
  31. 31.49 × 5 =
  32. 32.90 × 5 =
  33. 33.78 × 5 =
  34. 34.89 × 50 =
  35. 35.73 × 5 =
  36. 36.52 × 5 =
  37. 37.42 × 5 =
  38. 38.85 × 5 =
  39. 39.34 × 5 =
  40. 40.12 × 5 =

Answer key

  1. 1400
  2. 415
  3. 285
  4. 4600
  5. 240
  6. 4750
  7. 2250
  8. 175
  9. 150
  10. 90
  11. 120
  12. 140
  13. 110
  14. 4750
  15. 3300
  16. 285
  17. 140
  18. 1900
  19. 210
  20. 1500
  21. 70
  22. 4700
  23. 480
  24. 245
  25. 4150
  26. 2800
  27. 475
  28. 165
  29. 1600
  30. 230
  31. 245
  32. 450
  33. 390
  34. 4450
  35. 365
  36. 260
  37. 210
  38. 425
  39. 170
  40. 60

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