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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 366 · 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. 1.86 × 50 =
  2. 2.70 × 5 =
  3. 3.42 × 5 =
  4. 4.24 × 50 =
  5. 5.81 × 50 =
  6. 6.64 × 50 =
  7. 7.14 × 5 =
  8. 8.52 × 5 =
  9. 9.46 × 50 =
  10. 10.51 × 50 =
  11. 11.55 × 5 =
  12. 12.49 × 5 =
  13. 13.35 × 5 =
  14. 14.83 × 5 =
  15. 15.68 × 5 =
  16. 16.26 × 50 =
  17. 17.76 × 5 =
  18. 18.55 × 50 =
  19. 19.29 × 5 =
  20. 20.43 × 50 =
  21. 21.17 × 5 =
  22. 22.36 × 50 =
  23. 23.17 × 5 =
  24. 24.31 × 5 =
  25. 25.24 × 50 =
  26. 26.22 × 5 =
  27. 27.33 × 50 =
  28. 28.24 × 50 =
  29. 29.53 × 5 =
  30. 30.65 × 50 =
  31. 31.63 × 50 =
  32. 32.31 × 5 =
  33. 33.20 × 5 =
  34. 34.54 × 5 =
  35. 35.74 × 50 =
  36. 36.75 × 5 =
  37. 37.44 × 5 =
  38. 38.43 × 5 =
  39. 39.68 × 5 =
  40. 40.21 × 50 =

Answer key

  1. 4300
  2. 350
  3. 210
  4. 1200
  5. 4050
  6. 3200
  7. 70
  8. 260
  9. 2300
  10. 2550
  11. 275
  12. 245
  13. 175
  14. 415
  15. 340
  16. 1300
  17. 380
  18. 2750
  19. 145
  20. 2150
  21. 85
  22. 1800
  23. 85
  24. 155
  25. 1200
  26. 110
  27. 1650
  28. 1200
  29. 265
  30. 3250
  31. 3150
  32. 155
  33. 100
  34. 270
  35. 3700
  36. 375
  37. 220
  38. 215
  39. 340
  40. 1050

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