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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 170 · 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. 1.51 × 50 =
  2. 2.62 × 5 =
  3. 3.45 × 5 =
  4. 4.47 × 5 =
  5. 5.48 × 5 =
  6. 6.89 × 5 =
  7. 7.67 × 5 =
  8. 8.52 × 5 =
  9. 9.74 × 50 =
  10. 10.54 × 5 =
  11. 11.25 × 50 =
  12. 12.67 × 50 =
  13. 13.14 × 50 =
  14. 14.58 × 5 =
  15. 15.84 × 5 =
  16. 16.20 × 5 =
  17. 17.82 × 5 =
  18. 18.33 × 50 =
  19. 19.71 × 50 =
  20. 20.13 × 50 =
  21. 21.73 × 5 =
  22. 22.13 × 50 =
  23. 23.76 × 5 =
  24. 24.87 × 5 =
  25. 25.44 × 5 =
  26. 26.70 × 50 =
  27. 27.26 × 50 =
  28. 28.29 × 50 =
  29. 29.61 × 5 =
  30. 30.97 × 5 =
  31. 31.34 × 50 =
  32. 32.37 × 5 =
  33. 33.22 × 5 =
  34. 34.19 × 50 =
  35. 35.79 × 5 =
  36. 36.80 × 5 =
  37. 37.17 × 50 =
  38. 38.83 × 5 =
  39. 39.90 × 50 =
  40. 40.83 × 5 =

Answer key

  1. 2550
  2. 310
  3. 225
  4. 235
  5. 240
  6. 445
  7. 335
  8. 260
  9. 3700
  10. 270
  11. 1250
  12. 3350
  13. 700
  14. 290
  15. 420
  16. 100
  17. 410
  18. 1650
  19. 3550
  20. 650
  21. 365
  22. 650
  23. 380
  24. 435
  25. 220
  26. 3500
  27. 1300
  28. 1450
  29. 305
  30. 485
  31. 1700
  32. 185
  33. 110
  34. 950
  35. 395
  36. 400
  37. 850
  38. 415
  39. 4500
  40. 415

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