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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 351 · 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. 1.41 × 50 =
  2. 2.14 × 5 =
  3. 3.98 × 50 =
  4. 4.80 × 50 =
  5. 5.31 × 50 =
  6. 6.67 × 50 =
  7. 7.18 × 5 =
  8. 8.54 × 50 =
  9. 9.61 × 5 =
  10. 10.69 × 50 =
  11. 11.89 × 50 =
  12. 12.38 × 5 =
  13. 13.27 × 5 =
  14. 14.86 × 5 =
  15. 15.18 × 5 =
  16. 16.65 × 50 =
  17. 17.97 × 5 =
  18. 18.98 × 50 =
  19. 19.50 × 5 =
  20. 20.92 × 50 =
  21. 21.87 × 5 =
  22. 22.75 × 5 =
  23. 23.46 × 5 =
  24. 24.23 × 50 =
  25. 25.30 × 5 =
  26. 26.96 × 5 =
  27. 27.94 × 50 =
  28. 28.81 × 5 =
  29. 29.54 × 5 =
  30. 30.35 × 5 =
  31. 31.84 × 50 =
  32. 32.90 × 50 =
  33. 33.63 × 50 =
  34. 34.56 × 50 =
  35. 35.43 × 50 =
  36. 36.43 × 50 =
  37. 37.49 × 50 =
  38. 38.68 × 5 =
  39. 39.31 × 5 =
  40. 40.39 × 50 =

Answer key

  1. 2050
  2. 70
  3. 4900
  4. 4000
  5. 1550
  6. 3350
  7. 90
  8. 2700
  9. 305
  10. 3450
  11. 4450
  12. 190
  13. 135
  14. 430
  15. 90
  16. 3250
  17. 485
  18. 4900
  19. 250
  20. 4600
  21. 435
  22. 375
  23. 230
  24. 1150
  25. 150
  26. 480
  27. 4700
  28. 405
  29. 270
  30. 175
  31. 4200
  32. 4500
  33. 3150
  34. 2800
  35. 2150
  36. 2150
  37. 2450
  38. 340
  39. 155
  40. 1950

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