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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 536 · 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 × 5 =
  2. 2.32 × 5 =
  3. 3.75 × 5 =
  4. 4.29 × 5 =
  5. 5.13 × 50 =
  6. 6.13 × 50 =
  7. 7.37 × 5 =
  8. 8.76 × 5 =
  9. 9.12 × 50 =
  10. 10.98 × 50 =
  11. 11.71 × 5 =
  12. 12.74 × 50 =
  13. 13.74 × 50 =
  14. 14.77 × 5 =
  15. 15.32 × 5 =
  16. 16.25 × 5 =
  17. 17.58 × 5 =
  18. 18.15 × 50 =
  19. 19.19 × 5 =
  20. 20.39 × 5 =
  21. 21.90 × 5 =
  22. 22.72 × 5 =
  23. 23.63 × 50 =
  24. 24.43 × 5 =
  25. 25.40 × 5 =
  26. 26.24 × 5 =
  27. 27.96 × 5 =
  28. 28.34 × 5 =
  29. 29.39 × 5 =
  30. 30.48 × 5 =
  31. 31.91 × 5 =
  32. 32.85 × 5 =
  33. 33.78 × 50 =
  34. 34.72 × 50 =
  35. 35.12 × 50 =
  36. 36.65 × 50 =
  37. 37.32 × 5 =
  38. 38.70 × 50 =
  39. 39.88 × 5 =
  40. 40.73 × 50 =

Answer key

  1. 375
  2. 160
  3. 375
  4. 145
  5. 650
  6. 650
  7. 185
  8. 380
  9. 600
  10. 4900
  11. 355
  12. 3700
  13. 3700
  14. 385
  15. 160
  16. 125
  17. 290
  18. 750
  19. 95
  20. 195
  21. 450
  22. 360
  23. 3150
  24. 215
  25. 200
  26. 120
  27. 480
  28. 170
  29. 195
  30. 240
  31. 455
  32. 425
  33. 3900
  34. 3600
  35. 600
  36. 3250
  37. 160
  38. 3500
  39. 440
  40. 3650

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