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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 266 · 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. 1.98 × 5 =
  2. 2.16 × 5 =
  3. 3.68 × 5 =
  4. 4.81 × 5 =
  5. 5.13 × 5 =
  6. 6.50 × 50 =
  7. 7.61 × 5 =
  8. 8.58 × 50 =
  9. 9.54 × 5 =
  10. 10.62 × 5 =
  11. 11.89 × 50 =
  12. 12.82 × 5 =
  13. 13.22 × 50 =
  14. 14.84 × 50 =
  15. 15.55 × 5 =
  16. 16.79 × 50 =
  17. 17.23 × 50 =
  18. 18.70 × 5 =
  19. 19.34 × 5 =
  20. 20.36 × 50 =
  21. 21.69 × 50 =
  22. 22.68 × 50 =
  23. 23.72 × 50 =
  24. 24.70 × 50 =
  25. 25.32 × 5 =
  26. 26.76 × 5 =
  27. 27.24 × 50 =
  28. 28.88 × 5 =
  29. 29.80 × 50 =
  30. 30.68 × 5 =
  31. 31.37 × 5 =
  32. 32.71 × 5 =
  33. 33.45 × 5 =
  34. 34.22 × 5 =
  35. 35.56 × 50 =
  36. 36.76 × 5 =
  37. 37.49 × 50 =
  38. 38.94 × 5 =
  39. 39.52 × 5 =
  40. 40.33 × 50 =

Answer key

  1. 490
  2. 80
  3. 340
  4. 405
  5. 65
  6. 2500
  7. 305
  8. 2900
  9. 270
  10. 310
  11. 4450
  12. 410
  13. 1100
  14. 4200
  15. 275
  16. 3950
  17. 1150
  18. 350
  19. 170
  20. 1800
  21. 3450
  22. 3400
  23. 3600
  24. 3500
  25. 160
  26. 380
  27. 1200
  28. 440
  29. 4000
  30. 340
  31. 185
  32. 355
  33. 225
  34. 110
  35. 2800
  36. 380
  37. 2450
  38. 470
  39. 260
  40. 1650

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