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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 649 · 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. 1.42 × 50 =
  2. 2.25 × 5 =
  3. 3.58 × 5 =
  4. 4.29 × 50 =
  5. 5.75 × 50 =
  6. 6.49 × 50 =
  7. 7.68 × 50 =
  8. 8.70 × 5 =
  9. 9.42 × 5 =
  10. 10.30 × 5 =
  11. 11.94 × 5 =
  12. 12.48 × 50 =
  13. 13.62 × 5 =
  14. 14.98 × 50 =
  15. 15.97 × 5 =
  16. 16.13 × 5 =
  17. 17.32 × 5 =
  18. 18.44 × 50 =
  19. 19.75 × 5 =
  20. 20.47 × 50 =
  21. 21.77 × 5 =
  22. 22.63 × 50 =
  23. 23.60 × 50 =
  24. 24.26 × 50 =
  25. 25.20 × 50 =
  26. 26.40 × 50 =
  27. 27.49 × 5 =
  28. 28.29 × 5 =
  29. 29.73 × 50 =
  30. 30.97 × 5 =
  31. 31.84 × 50 =
  32. 32.58 × 50 =
  33. 33.66 × 50 =
  34. 34.85 × 5 =
  35. 35.96 × 50 =
  36. 36.91 × 5 =
  37. 37.14 × 5 =
  38. 38.59 × 50 =
  39. 39.18 × 5 =
  40. 40.14 × 50 =

Answer key

  1. 2100
  2. 125
  3. 290
  4. 1450
  5. 3750
  6. 2450
  7. 3400
  8. 350
  9. 210
  10. 150
  11. 470
  12. 2400
  13. 310
  14. 4900
  15. 485
  16. 65
  17. 160
  18. 2200
  19. 375
  20. 2350
  21. 385
  22. 3150
  23. 3000
  24. 1300
  25. 1000
  26. 2000
  27. 245
  28. 145
  29. 3650
  30. 485
  31. 4200
  32. 2900
  33. 3300
  34. 425
  35. 4800
  36. 455
  37. 70
  38. 2950
  39. 90
  40. 700

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