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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 221 · 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. 1.33 × 5 =
  2. 2.84 × 50 =
  3. 3.98 × 5 =
  4. 4.98 × 5 =
  5. 5.40 × 5 =
  6. 6.64 × 50 =
  7. 7.90 × 50 =
  8. 8.14 × 50 =
  9. 9.35 × 5 =
  10. 10.29 × 50 =
  11. 11.82 × 5 =
  12. 12.40 × 50 =
  13. 13.72 × 5 =
  14. 14.47 × 50 =
  15. 15.86 × 5 =
  16. 16.92 × 50 =
  17. 17.14 × 50 =
  18. 18.17 × 50 =
  19. 19.85 × 50 =
  20. 20.65 × 50 =
  21. 21.43 × 5 =
  22. 22.31 × 50 =
  23. 23.53 × 5 =
  24. 24.49 × 5 =
  25. 25.14 × 5 =
  26. 26.56 × 50 =
  27. 27.42 × 50 =
  28. 28.15 × 50 =
  29. 29.29 × 50 =
  30. 30.91 × 5 =
  31. 31.12 × 50 =
  32. 32.87 × 5 =
  33. 33.30 × 50 =
  34. 34.31 × 50 =
  35. 35.49 × 5 =
  36. 36.97 × 5 =
  37. 37.18 × 5 =
  38. 38.23 × 5 =
  39. 39.28 × 5 =
  40. 40.93 × 5 =

Answer key

  1. 165
  2. 4200
  3. 490
  4. 490
  5. 200
  6. 3200
  7. 4500
  8. 700
  9. 175
  10. 1450
  11. 410
  12. 2000
  13. 360
  14. 2350
  15. 430
  16. 4600
  17. 700
  18. 850
  19. 4250
  20. 3250
  21. 215
  22. 1550
  23. 265
  24. 245
  25. 70
  26. 2800
  27. 2100
  28. 750
  29. 1450
  30. 455
  31. 600
  32. 435
  33. 1500
  34. 1550
  35. 245
  36. 485
  37. 90
  38. 115
  39. 140
  40. 465

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