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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 681 · 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. 1.71 × 5 =
  2. 2.18 × 50 =
  3. 3.14 × 5 =
  4. 4.90 × 5 =
  5. 5.21 × 5 =
  6. 6.39 × 5 =
  7. 7.21 × 50 =
  8. 8.31 × 50 =
  9. 9.89 × 50 =
  10. 10.27 × 5 =
  11. 11.90 × 50 =
  12. 12.50 × 50 =
  13. 13.61 × 5 =
  14. 14.75 × 50 =
  15. 15.46 × 50 =
  16. 16.51 × 50 =
  17. 17.95 × 50 =
  18. 18.31 × 50 =
  19. 19.64 × 50 =
  20. 20.16 × 5 =
  21. 21.42 × 5 =
  22. 22.34 × 5 =
  23. 23.26 × 5 =
  24. 24.77 × 5 =
  25. 25.13 × 50 =
  26. 26.90 × 50 =
  27. 27.37 × 50 =
  28. 28.82 × 5 =
  29. 29.56 × 5 =
  30. 30.54 × 5 =
  31. 31.94 × 50 =
  32. 32.61 × 50 =
  33. 33.73 × 5 =
  34. 34.65 × 5 =
  35. 35.42 × 5 =
  36. 36.40 × 5 =
  37. 37.67 × 5 =
  38. 38.74 × 50 =
  39. 39.66 × 50 =
  40. 40.61 × 5 =

Answer key

  1. 355
  2. 900
  3. 70
  4. 450
  5. 105
  6. 195
  7. 1050
  8. 1550
  9. 4450
  10. 135
  11. 4500
  12. 2500
  13. 305
  14. 3750
  15. 2300
  16. 2550
  17. 4750
  18. 1550
  19. 3200
  20. 80
  21. 210
  22. 170
  23. 130
  24. 385
  25. 650
  26. 4500
  27. 1850
  28. 410
  29. 280
  30. 270
  31. 4700
  32. 3050
  33. 365
  34. 325
  35. 210
  36. 200
  37. 335
  38. 3700
  39. 3300
  40. 305

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