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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 798 · 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. 1.88 × 50 =
  2. 2.13 × 5 =
  3. 3.25 × 50 =
  4. 4.15 × 5 =
  5. 5.85 × 5 =
  6. 6.85 × 5 =
  7. 7.21 × 5 =
  8. 8.62 × 50 =
  9. 9.92 × 5 =
  10. 10.95 × 5 =
  11. 11.14 × 50 =
  12. 12.33 × 5 =
  13. 13.79 × 50 =
  14. 14.68 × 5 =
  15. 15.32 × 50 =
  16. 16.75 × 5 =
  17. 17.18 × 5 =
  18. 18.52 × 5 =
  19. 19.20 × 5 =
  20. 20.61 × 5 =
  21. 21.26 × 5 =
  22. 22.47 × 5 =
  23. 23.93 × 5 =
  24. 24.93 × 5 =
  25. 25.40 × 5 =
  26. 26.82 × 50 =
  27. 27.28 × 5 =
  28. 28.94 × 5 =
  29. 29.60 × 50 =
  30. 30.43 × 50 =
  31. 31.51 × 5 =
  32. 32.66 × 5 =
  33. 33.39 × 50 =
  34. 34.68 × 50 =
  35. 35.18 × 5 =
  36. 36.23 × 5 =
  37. 37.61 × 5 =
  38. 38.61 × 50 =
  39. 39.67 × 5 =
  40. 40.32 × 50 =

Answer key

  1. 4400
  2. 65
  3. 1250
  4. 75
  5. 425
  6. 425
  7. 105
  8. 3100
  9. 460
  10. 475
  11. 700
  12. 165
  13. 3950
  14. 340
  15. 1600
  16. 375
  17. 90
  18. 260
  19. 100
  20. 305
  21. 130
  22. 235
  23. 465
  24. 465
  25. 200
  26. 4100
  27. 140
  28. 470
  29. 3000
  30. 2150
  31. 255
  32. 330
  33. 1950
  34. 3400
  35. 90
  36. 115
  37. 305
  38. 3050
  39. 335
  40. 1600

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