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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 89 · 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. 1.87 × 50 =
  2. 2.51 × 5 =
  3. 3.95 × 50 =
  4. 4.45 × 50 =
  5. 5.74 × 5 =
  6. 6.57 × 5 =
  7. 7.13 × 5 =
  8. 8.75 × 5 =
  9. 9.25 × 5 =
  10. 10.92 × 50 =
  11. 11.50 × 50 =
  12. 12.85 × 5 =
  13. 13.23 × 5 =
  14. 14.92 × 5 =
  15. 15.75 × 5 =
  16. 16.34 × 5 =
  17. 17.89 × 50 =
  18. 18.60 × 50 =
  19. 19.73 × 50 =
  20. 20.66 × 5 =
  21. 21.14 × 50 =
  22. 22.35 × 5 =
  23. 23.17 × 50 =
  24. 24.27 × 5 =
  25. 25.68 × 5 =
  26. 26.17 × 5 =
  27. 27.88 × 50 =
  28. 28.80 × 5 =
  29. 29.33 × 5 =
  30. 30.56 × 5 =
  31. 31.17 × 50 =
  32. 32.15 × 50 =
  33. 33.87 × 5 =
  34. 34.36 × 5 =
  35. 35.52 × 50 =
  36. 36.96 × 50 =
  37. 37.70 × 5 =
  38. 38.86 × 5 =
  39. 39.74 × 50 =
  40. 40.82 × 5 =

Answer key

  1. 4350
  2. 255
  3. 4750
  4. 2250
  5. 370
  6. 285
  7. 65
  8. 375
  9. 125
  10. 4600
  11. 2500
  12. 425
  13. 115
  14. 460
  15. 375
  16. 170
  17. 4450
  18. 3000
  19. 3650
  20. 330
  21. 700
  22. 175
  23. 850
  24. 135
  25. 340
  26. 85
  27. 4400
  28. 400
  29. 165
  30. 280
  31. 850
  32. 750
  33. 435
  34. 180
  35. 2600
  36. 4800
  37. 350
  38. 430
  39. 3700
  40. 410

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