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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 246 · 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. 1.33 × 50 =
  2. 2.84 × 5 =
  3. 3.53 × 5 =
  4. 4.22 × 5 =
  5. 5.90 × 5 =
  6. 6.18 × 50 =
  7. 7.38 × 5 =
  8. 8.56 × 5 =
  9. 9.45 × 50 =
  10. 10.88 × 50 =
  11. 11.26 × 50 =
  12. 12.66 × 50 =
  13. 13.75 × 5 =
  14. 14.87 × 50 =
  15. 15.74 × 5 =
  16. 16.67 × 5 =
  17. 17.85 × 50 =
  18. 18.18 × 5 =
  19. 19.18 × 50 =
  20. 20.22 × 5 =
  21. 21.88 × 50 =
  22. 22.23 × 50 =
  23. 23.58 × 50 =
  24. 24.38 × 50 =
  25. 25.58 × 50 =
  26. 26.42 × 50 =
  27. 27.55 × 5 =
  28. 28.84 × 5 =
  29. 29.47 × 5 =
  30. 30.56 × 5 =
  31. 31.32 × 50 =
  32. 32.54 × 50 =
  33. 33.63 × 5 =
  34. 34.52 × 50 =
  35. 35.33 × 5 =
  36. 36.32 × 50 =
  37. 37.39 × 50 =
  38. 38.46 × 5 =
  39. 39.97 × 5 =
  40. 40.65 × 50 =

Answer key

  1. 1650
  2. 420
  3. 265
  4. 110
  5. 450
  6. 900
  7. 190
  8. 280
  9. 2250
  10. 4400
  11. 1300
  12. 3300
  13. 375
  14. 4350
  15. 370
  16. 335
  17. 4250
  18. 90
  19. 900
  20. 110
  21. 4400
  22. 1150
  23. 2900
  24. 1900
  25. 2900
  26. 2100
  27. 275
  28. 420
  29. 235
  30. 280
  31. 1600
  32. 2700
  33. 315
  34. 2600
  35. 165
  36. 1600
  37. 1950
  38. 230
  39. 485
  40. 3250

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