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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 302 · 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. 1.84 × 50 =
  2. 2.40 × 50 =
  3. 3.31 × 50 =
  4. 4.33 × 50 =
  5. 5.75 × 50 =
  6. 6.22 × 50 =
  7. 7.19 × 5 =
  8. 8.17 × 5 =
  9. 9.26 × 5 =
  10. 10.21 × 50 =
  11. 11.53 × 5 =
  12. 12.18 × 50 =
  13. 13.28 × 5 =
  14. 14.21 × 50 =
  15. 15.96 × 50 =
  16. 16.54 × 5 =
  17. 17.55 × 5 =
  18. 18.81 × 5 =
  19. 19.15 × 50 =
  20. 20.21 × 5 =
  21. 21.94 × 5 =
  22. 22.61 × 5 =
  23. 23.96 × 50 =
  24. 24.34 × 5 =
  25. 25.23 × 50 =
  26. 26.84 × 50 =
  27. 27.41 × 50 =
  28. 28.81 × 5 =
  29. 29.51 × 50 =
  30. 30.62 × 50 =
  31. 31.73 × 5 =
  32. 32.98 × 5 =
  33. 33.86 × 5 =
  34. 34.87 × 50 =
  35. 35.31 × 50 =
  36. 36.65 × 5 =
  37. 37.28 × 50 =
  38. 38.34 × 5 =
  39. 39.48 × 5 =
  40. 40.71 × 5 =

Answer key

  1. 4200
  2. 2000
  3. 1550
  4. 1650
  5. 3750
  6. 1100
  7. 95
  8. 85
  9. 130
  10. 1050
  11. 265
  12. 900
  13. 140
  14. 1050
  15. 4800
  16. 270
  17. 275
  18. 405
  19. 750
  20. 105
  21. 470
  22. 305
  23. 4800
  24. 170
  25. 1150
  26. 4200
  27. 2050
  28. 405
  29. 2550
  30. 3100
  31. 365
  32. 490
  33. 430
  34. 4350
  35. 1550
  36. 325
  37. 1400
  38. 170
  39. 240
  40. 355

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