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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 781 · 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. 1.71 × 50 =
  2. 2.71 × 50 =
  3. 3.33 × 50 =
  4. 4.78 × 5 =
  5. 5.73 × 5 =
  6. 6.31 × 5 =
  7. 7.25 × 50 =
  8. 8.74 × 5 =
  9. 9.33 × 50 =
  10. 10.86 × 5 =
  11. 11.30 × 5 =
  12. 12.95 × 5 =
  13. 13.33 × 50 =
  14. 14.50 × 50 =
  15. 15.59 × 5 =
  16. 16.65 × 5 =
  17. 17.96 × 50 =
  18. 18.48 × 50 =
  19. 19.38 × 5 =
  20. 20.14 × 5 =
  21. 21.89 × 50 =
  22. 22.88 × 50 =
  23. 23.92 × 50 =
  24. 24.36 × 50 =
  25. 25.68 × 5 =
  26. 26.13 × 50 =
  27. 27.18 × 50 =
  28. 28.83 × 5 =
  29. 29.15 × 50 =
  30. 30.24 × 5 =
  31. 31.51 × 5 =
  32. 32.16 × 5 =
  33. 33.76 × 5 =
  34. 34.54 × 5 =
  35. 35.13 × 5 =
  36. 36.18 × 50 =
  37. 37.91 × 50 =
  38. 38.29 × 50 =
  39. 39.82 × 50 =
  40. 40.78 × 5 =

Answer key

  1. 3550
  2. 3550
  3. 1650
  4. 390
  5. 365
  6. 155
  7. 1250
  8. 370
  9. 1650
  10. 430
  11. 150
  12. 475
  13. 1650
  14. 2500
  15. 295
  16. 325
  17. 4800
  18. 2400
  19. 190
  20. 70
  21. 4450
  22. 4400
  23. 4600
  24. 1800
  25. 340
  26. 650
  27. 900
  28. 415
  29. 750
  30. 120
  31. 255
  32. 80
  33. 380
  34. 270
  35. 65
  36. 900
  37. 4550
  38. 1450
  39. 4100
  40. 390

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