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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 786 · 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. 1.21 × 5 =
  2. 2.31 × 5 =
  3. 3.28 × 50 =
  4. 4.87 × 50 =
  5. 5.21 × 5 =
  6. 6.39 × 5 =
  7. 7.40 × 5 =
  8. 8.23 × 5 =
  9. 9.71 × 5 =
  10. 10.63 × 5 =
  11. 11.59 × 50 =
  12. 12.91 × 5 =
  13. 13.40 × 5 =
  14. 14.15 × 50 =
  15. 15.66 × 50 =
  16. 16.68 × 5 =
  17. 17.40 × 5 =
  18. 18.67 × 5 =
  19. 19.69 × 50 =
  20. 20.27 × 5 =
  21. 21.43 × 50 =
  22. 22.48 × 50 =
  23. 23.48 × 5 =
  24. 24.96 × 50 =
  25. 25.42 × 5 =
  26. 26.58 × 5 =
  27. 27.54 × 50 =
  28. 28.96 × 50 =
  29. 29.62 × 50 =
  30. 30.14 × 50 =
  31. 31.76 × 50 =
  32. 32.69 × 5 =
  33. 33.31 × 50 =
  34. 34.63 × 50 =
  35. 35.13 × 50 =
  36. 36.58 × 5 =
  37. 37.73 × 50 =
  38. 38.84 × 5 =
  39. 39.85 × 50 =
  40. 40.65 × 5 =

Answer key

  1. 105
  2. 155
  3. 1400
  4. 4350
  5. 105
  6. 195
  7. 200
  8. 115
  9. 355
  10. 315
  11. 2950
  12. 455
  13. 200
  14. 750
  15. 3300
  16. 340
  17. 200
  18. 335
  19. 3450
  20. 135
  21. 2150
  22. 2400
  23. 240
  24. 4800
  25. 210
  26. 290
  27. 2700
  28. 4800
  29. 3100
  30. 700
  31. 3800
  32. 345
  33. 1550
  34. 3150
  35. 650
  36. 290
  37. 3650
  38. 420
  39. 4250
  40. 325

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