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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 745 · 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. 1.68 × 50 =
  2. 2.22 × 50 =
  3. 3.74 × 5 =
  4. 4.90 × 5 =
  5. 5.48 × 50 =
  6. 6.54 × 50 =
  7. 7.75 × 50 =
  8. 8.90 × 5 =
  9. 9.65 × 50 =
  10. 10.49 × 50 =
  11. 11.64 × 50 =
  12. 12.81 × 50 =
  13. 13.62 × 5 =
  14. 14.32 × 50 =
  15. 15.56 × 50 =
  16. 16.49 × 5 =
  17. 17.76 × 5 =
  18. 18.19 × 50 =
  19. 19.35 × 5 =
  20. 20.39 × 5 =
  21. 21.90 × 5 =
  22. 22.74 × 5 =
  23. 23.36 × 5 =
  24. 24.15 × 50 =
  25. 25.24 × 5 =
  26. 26.18 × 50 =
  27. 27.43 × 5 =
  28. 28.76 × 5 =
  29. 29.17 × 5 =
  30. 30.17 × 5 =
  31. 31.84 × 5 =
  32. 32.61 × 50 =
  33. 33.12 × 5 =
  34. 34.14 × 5 =
  35. 35.81 × 5 =
  36. 36.17 × 5 =
  37. 37.35 × 5 =
  38. 38.16 × 5 =
  39. 39.74 × 50 =
  40. 40.68 × 50 =

Answer key

  1. 3400
  2. 1100
  3. 370
  4. 450
  5. 2400
  6. 2700
  7. 3750
  8. 450
  9. 3250
  10. 2450
  11. 3200
  12. 4050
  13. 310
  14. 1600
  15. 2800
  16. 245
  17. 380
  18. 950
  19. 175
  20. 195
  21. 450
  22. 370
  23. 180
  24. 750
  25. 120
  26. 900
  27. 215
  28. 380
  29. 85
  30. 85
  31. 420
  32. 3050
  33. 60
  34. 70
  35. 405
  36. 85
  37. 175
  38. 80
  39. 3700
  40. 3400

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