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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 166 · 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. 1.29 × 50 =
  2. 2.18 × 5 =
  3. 3.87 × 50 =
  4. 4.89 × 5 =
  5. 5.79 × 50 =
  6. 6.75 × 5 =
  7. 7.85 × 5 =
  8. 8.23 × 50 =
  9. 9.93 × 5 =
  10. 10.35 × 5 =
  11. 11.41 × 50 =
  12. 12.81 × 50 =
  13. 13.62 × 50 =
  14. 14.76 × 50 =
  15. 15.48 × 50 =
  16. 16.55 × 50 =
  17. 17.51 × 50 =
  18. 18.28 × 5 =
  19. 19.78 × 5 =
  20. 20.27 × 50 =
  21. 21.94 × 5 =
  22. 22.36 × 5 =
  23. 23.90 × 5 =
  24. 24.78 × 5 =
  25. 25.94 × 5 =
  26. 26.61 × 50 =
  27. 27.85 × 50 =
  28. 28.32 × 50 =
  29. 29.56 × 5 =
  30. 30.69 × 50 =
  31. 31.86 × 50 =
  32. 32.30 × 5 =
  33. 33.92 × 50 =
  34. 34.78 × 50 =
  35. 35.59 × 5 =
  36. 36.59 × 5 =
  37. 37.23 × 5 =
  38. 38.73 × 5 =
  39. 39.55 × 5 =
  40. 40.49 × 5 =

Answer key

  1. 1450
  2. 90
  3. 4350
  4. 445
  5. 3950
  6. 375
  7. 425
  8. 1150
  9. 465
  10. 175
  11. 2050
  12. 4050
  13. 3100
  14. 3800
  15. 2400
  16. 2750
  17. 2550
  18. 140
  19. 390
  20. 1350
  21. 470
  22. 180
  23. 450
  24. 390
  25. 470
  26. 3050
  27. 4250
  28. 1600
  29. 280
  30. 3450
  31. 4300
  32. 150
  33. 4600
  34. 3900
  35. 295
  36. 295
  37. 115
  38. 365
  39. 275
  40. 245

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