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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 395 · 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. 1.72 × 50 =
  2. 2.27 × 5 =
  3. 3.51 × 50 =
  4. 4.25 × 50 =
  5. 5.43 × 5 =
  6. 6.23 × 5 =
  7. 7.66 × 50 =
  8. 8.29 × 50 =
  9. 9.23 × 50 =
  10. 10.86 × 5 =
  11. 11.53 × 50 =
  12. 12.52 × 5 =
  13. 13.90 × 5 =
  14. 14.78 × 50 =
  15. 15.73 × 50 =
  16. 16.97 × 5 =
  17. 17.21 × 5 =
  18. 18.83 × 50 =
  19. 19.72 × 5 =
  20. 20.92 × 5 =
  21. 21.61 × 5 =
  22. 22.61 × 5 =
  23. 23.85 × 5 =
  24. 24.92 × 50 =
  25. 25.12 × 50 =
  26. 26.63 × 5 =
  27. 27.93 × 50 =
  28. 28.13 × 50 =
  29. 29.49 × 50 =
  30. 30.24 × 50 =
  31. 31.74 × 50 =
  32. 32.82 × 5 =
  33. 33.39 × 5 =
  34. 34.47 × 50 =
  35. 35.41 × 50 =
  36. 36.57 × 5 =
  37. 37.19 × 50 =
  38. 38.69 × 5 =
  39. 39.43 × 50 =
  40. 40.42 × 50 =

Answer key

  1. 3600
  2. 135
  3. 2550
  4. 1250
  5. 215
  6. 115
  7. 3300
  8. 1450
  9. 1150
  10. 430
  11. 2650
  12. 260
  13. 450
  14. 3900
  15. 3650
  16. 485
  17. 105
  18. 4150
  19. 360
  20. 460
  21. 305
  22. 305
  23. 425
  24. 4600
  25. 600
  26. 315
  27. 4650
  28. 650
  29. 2450
  30. 1200
  31. 3700
  32. 410
  33. 195
  34. 2350
  35. 2050
  36. 285
  37. 950
  38. 345
  39. 2150
  40. 2100

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