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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 136 · 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. 1.72 × 50 =
  2. 2.53 × 5 =
  3. 3.67 × 5 =
  4. 4.53 × 5 =
  5. 5.13 × 50 =
  6. 6.75 × 50 =
  7. 7.88 × 5 =
  8. 8.21 × 5 =
  9. 9.90 × 50 =
  10. 10.37 × 5 =
  11. 11.94 × 50 =
  12. 12.27 × 50 =
  13. 13.91 × 5 =
  14. 14.80 × 5 =
  15. 15.22 × 5 =
  16. 16.84 × 5 =
  17. 17.46 × 50 =
  18. 18.55 × 5 =
  19. 19.51 × 5 =
  20. 20.63 × 5 =
  21. 21.12 × 5 =
  22. 22.34 × 5 =
  23. 23.96 × 5 =
  24. 24.38 × 5 =
  25. 25.85 × 5 =
  26. 26.75 × 5 =
  27. 27.81 × 50 =
  28. 28.92 × 50 =
  29. 29.46 × 50 =
  30. 30.47 × 5 =
  31. 31.63 × 50 =
  32. 32.59 × 50 =
  33. 33.65 × 5 =
  34. 34.21 × 50 =
  35. 35.19 × 50 =
  36. 36.52 × 5 =
  37. 37.81 × 5 =
  38. 38.78 × 50 =
  39. 39.29 × 50 =
  40. 40.86 × 5 =

Answer key

  1. 3600
  2. 265
  3. 335
  4. 265
  5. 650
  6. 3750
  7. 440
  8. 105
  9. 4500
  10. 185
  11. 4700
  12. 1350
  13. 455
  14. 400
  15. 110
  16. 420
  17. 2300
  18. 275
  19. 255
  20. 315
  21. 60
  22. 170
  23. 480
  24. 190
  25. 425
  26. 375
  27. 4050
  28. 4600
  29. 2300
  30. 235
  31. 3150
  32. 2950
  33. 325
  34. 1050
  35. 950
  36. 260
  37. 405
  38. 3900
  39. 1450
  40. 430

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