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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 813 · 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. 1.27 × 5 =
  2. 2.42 × 5 =
  3. 3.67 × 5 =
  4. 4.90 × 50 =
  5. 5.80 × 5 =
  6. 6.56 × 5 =
  7. 7.78 × 5 =
  8. 8.77 × 5 =
  9. 9.66 × 50 =
  10. 10.24 × 50 =
  11. 11.47 × 5 =
  12. 12.30 × 50 =
  13. 13.39 × 50 =
  14. 14.95 × 5 =
  15. 15.76 × 50 =
  16. 16.29 × 50 =
  17. 17.25 × 50 =
  18. 18.78 × 50 =
  19. 19.46 × 5 =
  20. 20.83 × 50 =
  21. 21.44 × 50 =
  22. 22.96 × 50 =
  23. 23.90 × 50 =
  24. 24.71 × 5 =
  25. 25.13 × 5 =
  26. 26.30 × 50 =
  27. 27.63 × 5 =
  28. 28.74 × 50 =
  29. 29.92 × 5 =
  30. 30.74 × 50 =
  31. 31.57 × 50 =
  32. 32.91 × 5 =
  33. 33.98 × 5 =
  34. 34.46 × 50 =
  35. 35.45 × 5 =
  36. 36.92 × 5 =
  37. 37.92 × 50 =
  38. 38.95 × 5 =
  39. 39.61 × 5 =
  40. 40.56 × 5 =

Answer key

  1. 135
  2. 210
  3. 335
  4. 4500
  5. 400
  6. 280
  7. 390
  8. 385
  9. 3300
  10. 1200
  11. 235
  12. 1500
  13. 1950
  14. 475
  15. 3800
  16. 1450
  17. 1250
  18. 3900
  19. 230
  20. 4150
  21. 2200
  22. 4800
  23. 4500
  24. 355
  25. 65
  26. 1500
  27. 315
  28. 3700
  29. 460
  30. 3700
  31. 2850
  32. 455
  33. 490
  34. 2300
  35. 225
  36. 460
  37. 4600
  38. 475
  39. 305
  40. 280

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