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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 784 · 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. 1.28 × 50 =
  2. 2.29 × 5 =
  3. 3.37 × 5 =
  4. 4.35 × 5 =
  5. 5.25 × 5 =
  6. 6.92 × 50 =
  7. 7.91 × 50 =
  8. 8.27 × 5 =
  9. 9.59 × 50 =
  10. 10.59 × 5 =
  11. 11.36 × 5 =
  12. 12.18 × 50 =
  13. 13.34 × 5 =
  14. 14.57 × 5 =
  15. 15.50 × 50 =
  16. 16.48 × 5 =
  17. 17.71 × 50 =
  18. 18.39 × 5 =
  19. 19.53 × 50 =
  20. 20.48 × 50 =
  21. 21.25 × 5 =
  22. 22.31 × 5 =
  23. 23.25 × 50 =
  24. 24.87 × 5 =
  25. 25.57 × 5 =
  26. 26.51 × 50 =
  27. 27.59 × 5 =
  28. 28.12 × 5 =
  29. 29.27 × 5 =
  30. 30.75 × 5 =
  31. 31.84 × 50 =
  32. 32.49 × 50 =
  33. 33.29 × 5 =
  34. 34.44 × 5 =
  35. 35.58 × 5 =
  36. 36.25 × 5 =
  37. 37.45 × 5 =
  38. 38.26 × 50 =
  39. 39.85 × 5 =
  40. 40.89 × 5 =

Answer key

  1. 1400
  2. 145
  3. 185
  4. 175
  5. 125
  6. 4600
  7. 4550
  8. 135
  9. 2950
  10. 295
  11. 180
  12. 900
  13. 170
  14. 285
  15. 2500
  16. 240
  17. 3550
  18. 195
  19. 2650
  20. 2400
  21. 125
  22. 155
  23. 1250
  24. 435
  25. 285
  26. 2550
  27. 295
  28. 60
  29. 135
  30. 375
  31. 4200
  32. 2450
  33. 145
  34. 220
  35. 290
  36. 125
  37. 225
  38. 1300
  39. 425
  40. 445

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