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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 570 · 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. 1.54 × 50 =
  2. 2.42 × 5 =
  3. 3.74 × 50 =
  4. 4.86 × 50 =
  5. 5.65 × 5 =
  6. 6.46 × 5 =
  7. 7.61 × 5 =
  8. 8.38 × 50 =
  9. 9.66 × 5 =
  10. 10.77 × 50 =
  11. 11.23 × 50 =
  12. 12.86 × 5 =
  13. 13.24 × 5 =
  14. 14.77 × 50 =
  15. 15.92 × 5 =
  16. 16.26 × 5 =
  17. 17.60 × 5 =
  18. 18.33 × 50 =
  19. 19.44 × 50 =
  20. 20.41 × 50 =
  21. 21.95 × 5 =
  22. 22.34 × 50 =
  23. 23.57 × 5 =
  24. 24.35 × 50 =
  25. 25.23 × 5 =
  26. 26.93 × 5 =
  27. 27.76 × 5 =
  28. 28.88 × 50 =
  29. 29.97 × 50 =
  30. 30.50 × 50 =
  31. 31.37 × 5 =
  32. 32.12 × 5 =
  33. 33.20 × 50 =
  34. 34.19 × 5 =
  35. 35.13 × 5 =
  36. 36.51 × 50 =
  37. 37.68 × 5 =
  38. 38.76 × 5 =
  39. 39.26 × 5 =
  40. 40.31 × 5 =

Answer key

  1. 2700
  2. 210
  3. 3700
  4. 4300
  5. 325
  6. 230
  7. 305
  8. 1900
  9. 330
  10. 3850
  11. 1150
  12. 430
  13. 120
  14. 3850
  15. 460
  16. 130
  17. 300
  18. 1650
  19. 2200
  20. 2050
  21. 475
  22. 1700
  23. 285
  24. 1750
  25. 115
  26. 465
  27. 380
  28. 4400
  29. 4850
  30. 2500
  31. 185
  32. 60
  33. 1000
  34. 95
  35. 65
  36. 2550
  37. 340
  38. 380
  39. 130
  40. 155

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