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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 495 · 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. 1.36 × 5 =
  2. 2.82 × 5 =
  3. 3.57 × 5 =
  4. 4.14 × 5 =
  5. 5.18 × 50 =
  6. 6.21 × 5 =
  7. 7.52 × 5 =
  8. 8.72 × 5 =
  9. 9.59 × 5 =
  10. 10.67 × 5 =
  11. 11.43 × 50 =
  12. 12.60 × 5 =
  13. 13.20 × 50 =
  14. 14.94 × 5 =
  15. 15.89 × 5 =
  16. 16.68 × 5 =
  17. 17.72 × 50 =
  18. 18.31 × 50 =
  19. 19.75 × 50 =
  20. 20.26 × 50 =
  21. 21.50 × 5 =
  22. 22.52 × 5 =
  23. 23.82 × 5 =
  24. 24.56 × 50 =
  25. 25.63 × 5 =
  26. 26.36 × 50 =
  27. 27.23 × 5 =
  28. 28.97 × 5 =
  29. 29.45 × 50 =
  30. 30.49 × 50 =
  31. 31.95 × 5 =
  32. 32.82 × 5 =
  33. 33.65 × 5 =
  34. 34.98 × 50 =
  35. 35.45 × 5 =
  36. 36.17 × 5 =
  37. 37.67 × 5 =
  38. 38.88 × 5 =
  39. 39.93 × 5 =
  40. 40.66 × 50 =

Answer key

  1. 180
  2. 410
  3. 285
  4. 70
  5. 900
  6. 105
  7. 260
  8. 360
  9. 295
  10. 335
  11. 2150
  12. 300
  13. 1000
  14. 470
  15. 445
  16. 340
  17. 3600
  18. 1550
  19. 3750
  20. 1300
  21. 250
  22. 260
  23. 410
  24. 2800
  25. 315
  26. 1800
  27. 115
  28. 485
  29. 2250
  30. 2450
  31. 475
  32. 410
  33. 325
  34. 4900
  35. 225
  36. 85
  37. 335
  38. 440
  39. 465
  40. 3300

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