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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 601 · 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. 1.76 × 5 =
  2. 2.51 × 50 =
  3. 3.57 × 5 =
  4. 4.29 × 50 =
  5. 5.43 × 50 =
  6. 6.51 × 5 =
  7. 7.73 × 50 =
  8. 8.64 × 5 =
  9. 9.97 × 5 =
  10. 10.92 × 50 =
  11. 11.63 × 5 =
  12. 12.80 × 50 =
  13. 13.71 × 5 =
  14. 14.13 × 5 =
  15. 15.22 × 5 =
  16. 16.49 × 5 =
  17. 17.30 × 50 =
  18. 18.75 × 5 =
  19. 19.49 × 5 =
  20. 20.69 × 5 =
  21. 21.69 × 50 =
  22. 22.39 × 50 =
  23. 23.93 × 5 =
  24. 24.35 × 5 =
  25. 25.42 × 50 =
  26. 26.35 × 5 =
  27. 27.54 × 5 =
  28. 28.24 × 5 =
  29. 29.41 × 5 =
  30. 30.80 × 50 =
  31. 31.13 × 5 =
  32. 32.55 × 5 =
  33. 33.58 × 50 =
  34. 34.38 × 5 =
  35. 35.58 × 5 =
  36. 36.54 × 50 =
  37. 37.39 × 5 =
  38. 38.22 × 50 =
  39. 39.85 × 50 =
  40. 40.37 × 50 =

Answer key

  1. 380
  2. 2550
  3. 285
  4. 1450
  5. 2150
  6. 255
  7. 3650
  8. 320
  9. 485
  10. 4600
  11. 315
  12. 4000
  13. 355
  14. 65
  15. 110
  16. 245
  17. 1500
  18. 375
  19. 245
  20. 345
  21. 3450
  22. 1950
  23. 465
  24. 175
  25. 2100
  26. 175
  27. 270
  28. 120
  29. 205
  30. 4000
  31. 65
  32. 275
  33. 2900
  34. 190
  35. 290
  36. 2700
  37. 195
  38. 1100
  39. 4250
  40. 1850

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