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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 189 · 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. 1.79 × 5 =
  2. 2.72 × 50 =
  3. 3.55 × 50 =
  4. 4.53 × 5 =
  5. 5.41 × 50 =
  6. 6.22 × 50 =
  7. 7.24 × 5 =
  8. 8.61 × 5 =
  9. 9.20 × 5 =
  10. 10.63 × 5 =
  11. 11.62 × 50 =
  12. 12.23 × 5 =
  13. 13.40 × 50 =
  14. 14.29 × 50 =
  15. 15.25 × 50 =
  16. 16.70 × 50 =
  17. 17.29 × 50 =
  18. 18.67 × 50 =
  19. 19.94 × 5 =
  20. 20.31 × 5 =
  21. 21.46 × 50 =
  22. 22.97 × 5 =
  23. 23.60 × 5 =
  24. 24.20 × 5 =
  25. 25.13 × 50 =
  26. 26.58 × 5 =
  27. 27.96 × 50 =
  28. 28.31 × 50 =
  29. 29.23 × 50 =
  30. 30.20 × 5 =
  31. 31.71 × 50 =
  32. 32.89 × 5 =
  33. 33.47 × 50 =
  34. 34.75 × 5 =
  35. 35.80 × 5 =
  36. 36.89 × 5 =
  37. 37.91 × 50 =
  38. 38.54 × 50 =
  39. 39.67 × 5 =
  40. 40.30 × 50 =

Answer key

  1. 395
  2. 3600
  3. 2750
  4. 265
  5. 2050
  6. 1100
  7. 120
  8. 305
  9. 100
  10. 315
  11. 3100
  12. 115
  13. 2000
  14. 1450
  15. 1250
  16. 3500
  17. 1450
  18. 3350
  19. 470
  20. 155
  21. 2300
  22. 485
  23. 300
  24. 100
  25. 650
  26. 290
  27. 4800
  28. 1550
  29. 1150
  30. 100
  31. 3550
  32. 445
  33. 2350
  34. 375
  35. 400
  36. 445
  37. 4550
  38. 2700
  39. 335
  40. 1500

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