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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 644 · 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. 1.58 × 5 =
  2. 2.78 × 5 =
  3. 3.24 × 5 =
  4. 4.15 × 5 =
  5. 5.21 × 50 =
  6. 6.32 × 5 =
  7. 7.91 × 50 =
  8. 8.67 × 5 =
  9. 9.93 × 50 =
  10. 10.97 × 5 =
  11. 11.44 × 50 =
  12. 12.74 × 50 =
  13. 13.40 × 5 =
  14. 14.61 × 50 =
  15. 15.39 × 5 =
  16. 16.30 × 5 =
  17. 17.34 × 50 =
  18. 18.74 × 50 =
  19. 19.68 × 5 =
  20. 20.34 × 5 =
  21. 21.92 × 5 =
  22. 22.81 × 50 =
  23. 23.89 × 50 =
  24. 24.81 × 50 =
  25. 25.18 × 5 =
  26. 26.84 × 50 =
  27. 27.12 × 5 =
  28. 28.20 × 50 =
  29. 29.16 × 5 =
  30. 30.82 × 5 =
  31. 31.44 × 5 =
  32. 32.28 × 50 =
  33. 33.44 × 50 =
  34. 34.97 × 5 =
  35. 35.56 × 50 =
  36. 36.84 × 50 =
  37. 37.85 × 50 =
  38. 38.18 × 50 =
  39. 39.76 × 5 =
  40. 40.94 × 5 =

Answer key

  1. 290
  2. 390
  3. 120
  4. 75
  5. 1050
  6. 160
  7. 4550
  8. 335
  9. 4650
  10. 485
  11. 2200
  12. 3700
  13. 200
  14. 3050
  15. 195
  16. 150
  17. 1700
  18. 3700
  19. 340
  20. 170
  21. 460
  22. 4050
  23. 4450
  24. 4050
  25. 90
  26. 4200
  27. 60
  28. 1000
  29. 80
  30. 410
  31. 220
  32. 1400
  33. 2200
  34. 485
  35. 2800
  36. 4200
  37. 4250
  38. 900
  39. 380
  40. 470

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