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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 476 · 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. 1.42 × 50 =
  2. 2.95 × 5 =
  3. 3.34 × 5 =
  4. 4.12 × 50 =
  5. 5.26 × 5 =
  6. 6.77 × 5 =
  7. 7.75 × 5 =
  8. 8.74 × 5 =
  9. 9.29 × 5 =
  10. 10.13 × 50 =
  11. 11.30 × 50 =
  12. 12.71 × 5 =
  13. 13.20 × 50 =
  14. 14.43 × 5 =
  15. 15.38 × 5 =
  16. 16.39 × 50 =
  17. 17.44 × 5 =
  18. 18.34 × 50 =
  19. 19.63 × 5 =
  20. 20.90 × 50 =
  21. 21.16 × 5 =
  22. 22.35 × 5 =
  23. 23.65 × 5 =
  24. 24.95 × 50 =
  25. 25.15 × 50 =
  26. 26.96 × 50 =
  27. 27.12 × 5 =
  28. 28.17 × 5 =
  29. 29.15 × 50 =
  30. 30.92 × 50 =
  31. 31.40 × 5 =
  32. 32.63 × 50 =
  33. 33.22 × 50 =
  34. 34.33 × 5 =
  35. 35.75 × 5 =
  36. 36.33 × 50 =
  37. 37.27 × 5 =
  38. 38.64 × 5 =
  39. 39.85 × 50 =
  40. 40.79 × 50 =

Answer key

  1. 2100
  2. 475
  3. 170
  4. 600
  5. 130
  6. 385
  7. 375
  8. 370
  9. 145
  10. 650
  11. 1500
  12. 355
  13. 1000
  14. 215
  15. 190
  16. 1950
  17. 220
  18. 1700
  19. 315
  20. 4500
  21. 80
  22. 175
  23. 325
  24. 4750
  25. 750
  26. 4800
  27. 60
  28. 85
  29. 750
  30. 4600
  31. 200
  32. 3150
  33. 1100
  34. 165
  35. 375
  36. 1650
  37. 135
  38. 320
  39. 4250
  40. 3950

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