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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 375 · 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. 1.78 × 5 =
  2. 2.33 × 50 =
  3. 3.25 × 50 =
  4. 4.22 × 50 =
  5. 5.15 × 50 =
  6. 6.63 × 5 =
  7. 7.87 × 5 =
  8. 8.30 × 50 =
  9. 9.64 × 5 =
  10. 10.28 × 5 =
  11. 11.47 × 50 =
  12. 12.63 × 5 =
  13. 13.38 × 50 =
  14. 14.93 × 50 =
  15. 15.55 × 5 =
  16. 16.53 × 5 =
  17. 17.84 × 5 =
  18. 18.29 × 50 =
  19. 19.44 × 50 =
  20. 20.55 × 5 =
  21. 21.93 × 50 =
  22. 22.59 × 50 =
  23. 23.13 × 5 =
  24. 24.60 × 50 =
  25. 25.59 × 50 =
  26. 26.45 × 50 =
  27. 27.19 × 50 =
  28. 28.59 × 50 =
  29. 29.24 × 50 =
  30. 30.63 × 5 =
  31. 31.44 × 50 =
  32. 32.87 × 50 =
  33. 33.41 × 5 =
  34. 34.78 × 50 =
  35. 35.51 × 5 =
  36. 36.30 × 50 =
  37. 37.60 × 5 =
  38. 38.73 × 5 =
  39. 39.28 × 50 =
  40. 40.97 × 50 =

Answer key

  1. 390
  2. 1650
  3. 1250
  4. 1100
  5. 750
  6. 315
  7. 435
  8. 1500
  9. 320
  10. 140
  11. 2350
  12. 315
  13. 1900
  14. 4650
  15. 275
  16. 265
  17. 420
  18. 1450
  19. 2200
  20. 275
  21. 4650
  22. 2950
  23. 65
  24. 3000
  25. 2950
  26. 2250
  27. 950
  28. 2950
  29. 1200
  30. 315
  31. 2200
  32. 4350
  33. 205
  34. 3900
  35. 255
  36. 1500
  37. 300
  38. 365
  39. 1400
  40. 4850

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