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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 133 · 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. 1.14 × 5 =
  2. 2.13 × 50 =
  3. 3.53 × 5 =
  4. 4.78 × 50 =
  5. 5.33 × 50 =
  6. 6.27 × 5 =
  7. 7.85 × 5 =
  8. 8.85 × 5 =
  9. 9.46 × 50 =
  10. 10.74 × 5 =
  11. 11.83 × 5 =
  12. 12.42 × 50 =
  13. 13.16 × 50 =
  14. 14.90 × 50 =
  15. 15.83 × 5 =
  16. 16.76 × 5 =
  17. 17.19 × 50 =
  18. 18.68 × 5 =
  19. 19.30 × 50 =
  20. 20.39 × 50 =
  21. 21.39 × 50 =
  22. 22.52 × 5 =
  23. 23.75 × 5 =
  24. 24.26 × 50 =
  25. 25.55 × 50 =
  26. 26.61 × 5 =
  27. 27.71 × 5 =
  28. 28.38 × 5 =
  29. 29.47 × 5 =
  30. 30.29 × 50 =
  31. 31.72 × 5 =
  32. 32.38 × 50 =
  33. 33.23 × 5 =
  34. 34.96 × 5 =
  35. 35.93 × 5 =
  36. 36.58 × 5 =
  37. 37.36 × 50 =
  38. 38.25 × 5 =
  39. 39.42 × 50 =
  40. 40.20 × 5 =

Answer key

  1. 70
  2. 650
  3. 265
  4. 3900
  5. 1650
  6. 135
  7. 425
  8. 425
  9. 2300
  10. 370
  11. 415
  12. 2100
  13. 800
  14. 4500
  15. 415
  16. 380
  17. 950
  18. 340
  19. 1500
  20. 1950
  21. 1950
  22. 260
  23. 375
  24. 1300
  25. 2750
  26. 305
  27. 355
  28. 190
  29. 235
  30. 1450
  31. 360
  32. 1900
  33. 115
  34. 480
  35. 465
  36. 290
  37. 1800
  38. 125
  39. 2100
  40. 100

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