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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 70 · 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. 1.96 × 5 =
  2. 2.78 × 50 =
  3. 3.90 × 50 =
  4. 4.77 × 50 =
  5. 5.69 × 50 =
  6. 6.83 × 5 =
  7. 7.74 × 50 =
  8. 8.89 × 50 =
  9. 9.59 × 50 =
  10. 10.98 × 5 =
  11. 11.38 × 5 =
  12. 12.26 × 5 =
  13. 13.47 × 50 =
  14. 14.98 × 50 =
  15. 15.23 × 50 =
  16. 16.29 × 50 =
  17. 17.74 × 5 =
  18. 18.20 × 50 =
  19. 19.49 × 5 =
  20. 20.34 × 50 =
  21. 21.89 × 50 =
  22. 22.41 × 5 =
  23. 23.87 × 5 =
  24. 24.45 × 50 =
  25. 25.22 × 50 =
  26. 26.19 × 50 =
  27. 27.50 × 5 =
  28. 28.58 × 5 =
  29. 29.50 × 50 =
  30. 30.96 × 5 =
  31. 31.43 × 5 =
  32. 32.60 × 5 =
  33. 33.90 × 5 =
  34. 34.21 × 5 =
  35. 35.13 × 5 =
  36. 36.51 × 50 =
  37. 37.71 × 50 =
  38. 38.28 × 5 =
  39. 39.94 × 5 =
  40. 40.12 × 5 =

Answer key

  1. 480
  2. 3900
  3. 4500
  4. 3850
  5. 3450
  6. 415
  7. 3700
  8. 4450
  9. 2950
  10. 490
  11. 190
  12. 130
  13. 2350
  14. 4900
  15. 1150
  16. 1450
  17. 370
  18. 1000
  19. 245
  20. 1700
  21. 4450
  22. 205
  23. 435
  24. 2250
  25. 1100
  26. 950
  27. 250
  28. 290
  29. 2500
  30. 480
  31. 215
  32. 300
  33. 450
  34. 105
  35. 65
  36. 2550
  37. 3550
  38. 140
  39. 470
  40. 60

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