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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 279 · 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. 1.75 × 50 =
  2. 2.68 × 50 =
  3. 3.17 × 50 =
  4. 4.25 × 5 =
  5. 5.67 × 50 =
  6. 6.79 × 50 =
  7. 7.76 × 5 =
  8. 8.20 × 50 =
  9. 9.15 × 50 =
  10. 10.95 × 5 =
  11. 11.42 × 5 =
  12. 12.51 × 50 =
  13. 13.24 × 5 =
  14. 14.24 × 50 =
  15. 15.38 × 50 =
  16. 16.23 × 5 =
  17. 17.38 × 5 =
  18. 18.75 × 50 =
  19. 19.44 × 5 =
  20. 20.93 × 50 =
  21. 21.47 × 50 =
  22. 22.31 × 50 =
  23. 23.70 × 5 =
  24. 24.42 × 50 =
  25. 25.75 × 5 =
  26. 26.54 × 5 =
  27. 27.16 × 50 =
  28. 28.63 × 5 =
  29. 29.26 × 50 =
  30. 30.65 × 5 =
  31. 31.70 × 50 =
  32. 32.32 × 50 =
  33. 33.72 × 5 =
  34. 34.82 × 5 =
  35. 35.73 × 50 =
  36. 36.73 × 5 =
  37. 37.16 × 5 =
  38. 38.59 × 50 =
  39. 39.19 × 5 =
  40. 40.31 × 5 =

Answer key

  1. 3750
  2. 3400
  3. 850
  4. 125
  5. 3350
  6. 3950
  7. 380
  8. 1000
  9. 750
  10. 475
  11. 210
  12. 2550
  13. 120
  14. 1200
  15. 1900
  16. 115
  17. 190
  18. 3750
  19. 220
  20. 4650
  21. 2350
  22. 1550
  23. 350
  24. 2100
  25. 375
  26. 270
  27. 800
  28. 315
  29. 1300
  30. 325
  31. 3500
  32. 1600
  33. 360
  34. 410
  35. 3650
  36. 365
  37. 80
  38. 2950
  39. 95
  40. 155

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