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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 513 · 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. 1.69 × 5 =
  2. 2.87 × 50 =
  3. 3.86 × 50 =
  4. 4.75 × 50 =
  5. 5.66 × 50 =
  6. 6.65 × 50 =
  7. 7.94 × 5 =
  8. 8.71 × 5 =
  9. 9.79 × 50 =
  10. 10.32 × 50 =
  11. 11.63 × 5 =
  12. 12.61 × 50 =
  13. 13.22 × 50 =
  14. 14.63 × 50 =
  15. 15.72 × 5 =
  16. 16.69 × 5 =
  17. 17.20 × 50 =
  18. 18.22 × 50 =
  19. 19.77 × 50 =
  20. 20.90 × 5 =
  21. 21.34 × 50 =
  22. 22.95 × 5 =
  23. 23.90 × 50 =
  24. 24.20 × 5 =
  25. 25.51 × 5 =
  26. 26.27 × 5 =
  27. 27.48 × 50 =
  28. 28.50 × 50 =
  29. 29.93 × 5 =
  30. 30.80 × 50 =
  31. 31.85 × 50 =
  32. 32.61 × 5 =
  33. 33.68 × 5 =
  34. 34.91 × 50 =
  35. 35.82 × 5 =
  36. 36.96 × 5 =
  37. 37.86 × 5 =
  38. 38.42 × 5 =
  39. 39.63 × 5 =
  40. 40.55 × 5 =

Answer key

  1. 345
  2. 4350
  3. 4300
  4. 3750
  5. 3300
  6. 3250
  7. 470
  8. 355
  9. 3950
  10. 1600
  11. 315
  12. 3050
  13. 1100
  14. 3150
  15. 360
  16. 345
  17. 1000
  18. 1100
  19. 3850
  20. 450
  21. 1700
  22. 475
  23. 4500
  24. 100
  25. 255
  26. 135
  27. 2400
  28. 2500
  29. 465
  30. 4000
  31. 4250
  32. 305
  33. 340
  34. 4550
  35. 410
  36. 480
  37. 430
  38. 210
  39. 315
  40. 275

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