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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 586 · 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. 2.23 × 5 =
  3. 3.55 × 5 =
  4. 4.63 × 50 =
  5. 5.94 × 5 =
  6. 6.72 × 50 =
  7. 7.24 × 5 =
  8. 8.80 × 5 =
  9. 9.69 × 50 =
  10. 10.74 × 5 =
  11. 11.31 × 50 =
  12. 12.41 × 5 =
  13. 13.74 × 5 =
  14. 14.16 × 50 =
  15. 15.36 × 5 =
  16. 16.51 × 5 =
  17. 17.23 × 50 =
  18. 18.82 × 5 =
  19. 19.28 × 50 =
  20. 20.76 × 50 =
  21. 21.81 × 5 =
  22. 22.68 × 50 =
  23. 23.88 × 50 =
  24. 24.35 × 50 =
  25. 25.73 × 50 =
  26. 26.40 × 5 =
  27. 27.27 × 5 =
  28. 28.59 × 5 =
  29. 29.47 × 5 =
  30. 30.48 × 50 =
  31. 31.31 × 5 =
  32. 32.67 × 50 =
  33. 33.83 × 50 =
  34. 34.25 × 50 =
  35. 35.53 × 5 =
  36. 36.62 × 5 =
  37. 37.86 × 50 =
  38. 38.57 × 50 =
  39. 39.70 × 50 =
  40. 40.52 × 50 =

Answer key

  1. 420
  2. 115
  3. 275
  4. 3150
  5. 470
  6. 3600
  7. 120
  8. 400
  9. 3450
  10. 370
  11. 1550
  12. 205
  13. 370
  14. 800
  15. 180
  16. 255
  17. 1150
  18. 410
  19. 1400
  20. 3800
  21. 405
  22. 3400
  23. 4400
  24. 1750
  25. 3650
  26. 200
  27. 135
  28. 295
  29. 235
  30. 2400
  31. 155
  32. 3350
  33. 4150
  34. 1250
  35. 265
  36. 310
  37. 4300
  38. 2850
  39. 3500
  40. 2600

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