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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 785 · 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. 1.43 × 5 =
  2. 2.33 × 5 =
  3. 3.74 × 50 =
  4. 4.67 × 5 =
  5. 5.23 × 5 =
  6. 6.17 × 50 =
  7. 7.83 × 5 =
  8. 8.92 × 50 =
  9. 9.59 × 50 =
  10. 10.55 × 5 =
  11. 11.31 × 5 =
  12. 12.13 × 50 =
  13. 13.60 × 50 =
  14. 14.56 × 50 =
  15. 15.57 × 5 =
  16. 16.22 × 50 =
  17. 17.72 × 50 =
  18. 18.44 × 50 =
  19. 19.55 × 50 =
  20. 20.51 × 50 =
  21. 21.14 × 5 =
  22. 22.57 × 50 =
  23. 23.76 × 50 =
  24. 24.88 × 5 =
  25. 25.83 × 5 =
  26. 26.56 × 5 =
  27. 27.41 × 5 =
  28. 28.53 × 50 =
  29. 29.62 × 5 =
  30. 30.78 × 5 =
  31. 31.96 × 5 =
  32. 32.25 × 5 =
  33. 33.29 × 50 =
  34. 34.75 × 5 =
  35. 35.76 × 5 =
  36. 36.21 × 50 =
  37. 37.12 × 50 =
  38. 38.23 × 50 =
  39. 39.80 × 50 =
  40. 40.41 × 50 =

Answer key

  1. 215
  2. 165
  3. 3700
  4. 335
  5. 115
  6. 850
  7. 415
  8. 4600
  9. 2950
  10. 275
  11. 155
  12. 650
  13. 3000
  14. 2800
  15. 285
  16. 1100
  17. 3600
  18. 2200
  19. 2750
  20. 2550
  21. 70
  22. 2850
  23. 3800
  24. 440
  25. 415
  26. 280
  27. 205
  28. 2650
  29. 310
  30. 390
  31. 480
  32. 125
  33. 1450
  34. 375
  35. 380
  36. 1050
  37. 600
  38. 1150
  39. 4000
  40. 2050

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