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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 328 · 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. 1.73 × 5 =
  2. 2.92 × 5 =
  3. 3.38 × 5 =
  4. 4.23 × 50 =
  5. 5.53 × 5 =
  6. 6.68 × 5 =
  7. 7.18 × 50 =
  8. 8.86 × 50 =
  9. 9.12 × 50 =
  10. 10.87 × 5 =
  11. 11.16 × 5 =
  12. 12.74 × 50 =
  13. 13.31 × 50 =
  14. 14.29 × 5 =
  15. 15.42 × 50 =
  16. 16.24 × 5 =
  17. 17.32 × 5 =
  18. 18.81 × 5 =
  19. 19.58 × 5 =
  20. 20.74 × 5 =
  21. 21.81 × 50 =
  22. 22.64 × 5 =
  23. 23.66 × 50 =
  24. 24.29 × 5 =
  25. 25.72 × 5 =
  26. 26.89 × 5 =
  27. 27.60 × 5 =
  28. 28.37 × 5 =
  29. 29.61 × 5 =
  30. 30.37 × 50 =
  31. 31.52 × 5 =
  32. 32.65 × 5 =
  33. 33.92 × 50 =
  34. 34.64 × 5 =
  35. 35.34 × 5 =
  36. 36.94 × 50 =
  37. 37.97 × 50 =
  38. 38.52 × 50 =
  39. 39.25 × 5 =
  40. 40.47 × 5 =

Answer key

  1. 365
  2. 460
  3. 190
  4. 1150
  5. 265
  6. 340
  7. 900
  8. 4300
  9. 600
  10. 435
  11. 80
  12. 3700
  13. 1550
  14. 145
  15. 2100
  16. 120
  17. 160
  18. 405
  19. 290
  20. 370
  21. 4050
  22. 320
  23. 3300
  24. 145
  25. 360
  26. 445
  27. 300
  28. 185
  29. 305
  30. 1850
  31. 260
  32. 325
  33. 4600
  34. 320
  35. 170
  36. 4700
  37. 4850
  38. 2600
  39. 125
  40. 235

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