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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 312 · 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. 1.84 × 5 =
  2. 2.31 × 50 =
  3. 3.69 × 50 =
  4. 4.65 × 50 =
  5. 5.25 × 5 =
  6. 6.32 × 5 =
  7. 7.96 × 50 =
  8. 8.20 × 50 =
  9. 9.58 × 5 =
  10. 10.73 × 5 =
  11. 11.25 × 50 =
  12. 12.40 × 5 =
  13. 13.30 × 5 =
  14. 14.41 × 5 =
  15. 15.94 × 5 =
  16. 16.37 × 50 =
  17. 17.14 × 5 =
  18. 18.57 × 5 =
  19. 19.27 × 5 =
  20. 20.88 × 5 =
  21. 21.94 × 5 =
  22. 22.48 × 5 =
  23. 23.46 × 5 =
  24. 24.34 × 50 =
  25. 25.51 × 5 =
  26. 26.21 × 5 =
  27. 27.49 × 5 =
  28. 28.53 × 50 =
  29. 29.85 × 50 =
  30. 30.82 × 50 =
  31. 31.67 × 50 =
  32. 32.80 × 50 =
  33. 33.24 × 5 =
  34. 34.89 × 50 =
  35. 35.21 × 5 =
  36. 36.47 × 5 =
  37. 37.14 × 50 =
  38. 38.65 × 5 =
  39. 39.57 × 50 =
  40. 40.77 × 5 =

Answer key

  1. 420
  2. 1550
  3. 3450
  4. 3250
  5. 125
  6. 160
  7. 4800
  8. 1000
  9. 290
  10. 365
  11. 1250
  12. 200
  13. 150
  14. 205
  15. 470
  16. 1850
  17. 70
  18. 285
  19. 135
  20. 440
  21. 470
  22. 240
  23. 230
  24. 1700
  25. 255
  26. 105
  27. 245
  28. 2650
  29. 4250
  30. 4100
  31. 3350
  32. 4000
  33. 120
  34. 4450
  35. 105
  36. 235
  37. 700
  38. 325
  39. 2850
  40. 385

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