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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 802 · 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. 1.70 × 5 =
  2. 2.51 × 50 =
  3. 3.84 × 50 =
  4. 4.91 × 50 =
  5. 5.35 × 50 =
  6. 6.51 × 50 =
  7. 7.49 × 50 =
  8. 8.17 × 5 =
  9. 9.61 × 5 =
  10. 10.36 × 5 =
  11. 11.98 × 5 =
  12. 12.28 × 50 =
  13. 13.94 × 50 =
  14. 14.73 × 50 =
  15. 15.18 × 50 =
  16. 16.25 × 50 =
  17. 17.92 × 5 =
  18. 18.35 × 5 =
  19. 19.35 × 50 =
  20. 20.60 × 5 =
  21. 21.13 × 5 =
  22. 22.23 × 5 =
  23. 23.34 × 50 =
  24. 24.55 × 5 =
  25. 25.29 × 50 =
  26. 26.38 × 50 =
  27. 27.30 × 50 =
  28. 28.43 × 5 =
  29. 29.44 × 5 =
  30. 30.96 × 5 =
  31. 31.95 × 5 =
  32. 32.75 × 5 =
  33. 33.91 × 50 =
  34. 34.89 × 5 =
  35. 35.64 × 5 =
  36. 36.25 × 5 =
  37. 37.54 × 5 =
  38. 38.41 × 50 =
  39. 39.65 × 5 =
  40. 40.77 × 50 =

Answer key

  1. 350
  2. 2550
  3. 4200
  4. 4550
  5. 1750
  6. 2550
  7. 2450
  8. 85
  9. 305
  10. 180
  11. 490
  12. 1400
  13. 4700
  14. 3650
  15. 900
  16. 1250
  17. 460
  18. 175
  19. 1750
  20. 300
  21. 65
  22. 115
  23. 1700
  24. 275
  25. 1450
  26. 1900
  27. 1500
  28. 215
  29. 220
  30. 480
  31. 475
  32. 375
  33. 4550
  34. 445
  35. 320
  36. 125
  37. 270
  38. 2050
  39. 325
  40. 3850

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