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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 791 · 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. 1.92 × 5 =
  2. 2.17 × 50 =
  3. 3.49 × 50 =
  4. 4.94 × 50 =
  5. 5.55 × 5 =
  6. 6.24 × 5 =
  7. 7.27 × 5 =
  8. 8.47 × 50 =
  9. 9.17 × 5 =
  10. 10.62 × 5 =
  11. 11.84 × 5 =
  12. 12.95 × 5 =
  13. 13.96 × 50 =
  14. 14.91 × 50 =
  15. 15.20 × 50 =
  16. 16.45 × 50 =
  17. 17.16 × 50 =
  18. 18.77 × 5 =
  19. 19.41 × 5 =
  20. 20.78 × 50 =
  21. 21.21 × 5 =
  22. 22.36 × 5 =
  23. 23.80 × 5 =
  24. 24.54 × 5 =
  25. 25.87 × 50 =
  26. 26.59 × 5 =
  27. 27.34 × 5 =
  28. 28.70 × 50 =
  29. 29.63 × 50 =
  30. 30.84 × 50 =
  31. 31.97 × 5 =
  32. 32.22 × 5 =
  33. 33.56 × 50 =
  34. 34.49 × 50 =
  35. 35.77 × 5 =
  36. 36.24 × 50 =
  37. 37.55 × 50 =
  38. 38.34 × 50 =
  39. 39.78 × 50 =
  40. 40.60 × 5 =

Answer key

  1. 460
  2. 850
  3. 2450
  4. 4700
  5. 275
  6. 120
  7. 135
  8. 2350
  9. 85
  10. 310
  11. 420
  12. 475
  13. 4800
  14. 4550
  15. 1000
  16. 2250
  17. 800
  18. 385
  19. 205
  20. 3900
  21. 105
  22. 180
  23. 400
  24. 270
  25. 4350
  26. 295
  27. 170
  28. 3500
  29. 3150
  30. 4200
  31. 485
  32. 110
  33. 2800
  34. 2450
  35. 385
  36. 1200
  37. 2750
  38. 1700
  39. 3900
  40. 300

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