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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 347 · 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. 1.62 × 50 =
  2. 2.13 × 50 =
  3. 3.36 × 50 =
  4. 4.64 × 5 =
  5. 5.36 × 50 =
  6. 6.59 × 5 =
  7. 7.80 × 5 =
  8. 8.51 × 5 =
  9. 9.55 × 5 =
  10. 10.88 × 5 =
  11. 11.14 × 5 =
  12. 12.98 × 5 =
  13. 13.51 × 50 =
  14. 14.20 × 5 =
  15. 15.42 × 5 =
  16. 16.93 × 5 =
  17. 17.51 × 50 =
  18. 18.59 × 5 =
  19. 19.29 × 50 =
  20. 20.52 × 50 =
  21. 21.83 × 50 =
  22. 22.96 × 5 =
  23. 23.17 × 50 =
  24. 24.35 × 5 =
  25. 25.57 × 5 =
  26. 26.95 × 50 =
  27. 27.30 × 5 =
  28. 28.19 × 5 =
  29. 29.67 × 5 =
  30. 30.21 × 50 =
  31. 31.35 × 5 =
  32. 32.64 × 50 =
  33. 33.78 × 50 =
  34. 34.97 × 5 =
  35. 35.68 × 5 =
  36. 36.81 × 5 =
  37. 37.93 × 50 =
  38. 38.42 × 50 =
  39. 39.83 × 5 =
  40. 40.94 × 5 =

Answer key

  1. 3100
  2. 650
  3. 1800
  4. 320
  5. 1800
  6. 295
  7. 400
  8. 255
  9. 275
  10. 440
  11. 70
  12. 490
  13. 2550
  14. 100
  15. 210
  16. 465
  17. 2550
  18. 295
  19. 1450
  20. 2600
  21. 4150
  22. 480
  23. 850
  24. 175
  25. 285
  26. 4750
  27. 150
  28. 95
  29. 335
  30. 1050
  31. 175
  32. 3200
  33. 3900
  34. 485
  35. 340
  36. 405
  37. 4650
  38. 2100
  39. 415
  40. 470

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