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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 223 · 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. 1.34 × 50 =
  2. 2.74 × 5 =
  3. 3.59 × 5 =
  4. 4.42 × 5 =
  5. 5.74 × 50 =
  6. 6.80 × 50 =
  7. 7.27 × 5 =
  8. 8.64 × 50 =
  9. 9.27 × 5 =
  10. 10.56 × 5 =
  11. 11.79 × 5 =
  12. 12.28 × 50 =
  13. 13.62 × 5 =
  14. 14.12 × 50 =
  15. 15.71 × 50 =
  16. 16.35 × 5 =
  17. 17.30 × 50 =
  18. 18.91 × 50 =
  19. 19.86 × 5 =
  20. 20.86 × 5 =
  21. 21.25 × 50 =
  22. 22.91 × 50 =
  23. 23.93 × 5 =
  24. 24.98 × 5 =
  25. 25.45 × 5 =
  26. 26.93 × 50 =
  27. 27.36 × 50 =
  28. 28.76 × 50 =
  29. 29.70 × 5 =
  30. 30.90 × 50 =
  31. 31.51 × 50 =
  32. 32.70 × 5 =
  33. 33.82 × 5 =
  34. 34.32 × 5 =
  35. 35.79 × 50 =
  36. 36.18 × 5 =
  37. 37.14 × 5 =
  38. 38.69 × 5 =
  39. 39.73 × 50 =
  40. 40.29 × 5 =

Answer key

  1. 1700
  2. 370
  3. 295
  4. 210
  5. 3700
  6. 4000
  7. 135
  8. 3200
  9. 135
  10. 280
  11. 395
  12. 1400
  13. 310
  14. 600
  15. 3550
  16. 175
  17. 1500
  18. 4550
  19. 430
  20. 430
  21. 1250
  22. 4550
  23. 465
  24. 490
  25. 225
  26. 4650
  27. 1800
  28. 3800
  29. 350
  30. 4500
  31. 2550
  32. 350
  33. 410
  34. 160
  35. 3950
  36. 90
  37. 70
  38. 345
  39. 3650
  40. 145

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