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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 795 · 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. 1.70 × 5 =
  2. 2.54 × 5 =
  3. 3.76 × 5 =
  4. 4.32 × 5 =
  5. 5.18 × 50 =
  6. 6.32 × 5 =
  7. 7.79 × 50 =
  8. 8.17 × 50 =
  9. 9.55 × 5 =
  10. 10.73 × 50 =
  11. 11.58 × 50 =
  12. 12.64 × 50 =
  13. 13.35 × 50 =
  14. 14.23 × 50 =
  15. 15.78 × 5 =
  16. 16.91 × 5 =
  17. 17.46 × 5 =
  18. 18.57 × 5 =
  19. 19.55 × 50 =
  20. 20.20 × 5 =
  21. 21.81 × 50 =
  22. 22.35 × 50 =
  23. 23.40 × 50 =
  24. 24.21 × 5 =
  25. 25.29 × 5 =
  26. 26.61 × 50 =
  27. 27.44 × 5 =
  28. 28.97 × 50 =
  29. 29.86 × 5 =
  30. 30.68 × 5 =
  31. 31.24 × 50 =
  32. 32.24 × 5 =
  33. 33.52 × 50 =
  34. 34.91 × 5 =
  35. 35.33 × 50 =
  36. 36.23 × 50 =
  37. 37.75 × 50 =
  38. 38.26 × 50 =
  39. 39.34 × 5 =
  40. 40.14 × 5 =

Answer key

  1. 350
  2. 270
  3. 380
  4. 160
  5. 900
  6. 160
  7. 3950
  8. 850
  9. 275
  10. 3650
  11. 2900
  12. 3200
  13. 1750
  14. 1150
  15. 390
  16. 455
  17. 230
  18. 285
  19. 2750
  20. 100
  21. 4050
  22. 1750
  23. 2000
  24. 105
  25. 145
  26. 3050
  27. 220
  28. 4850
  29. 430
  30. 340
  31. 1200
  32. 120
  33. 2600
  34. 455
  35. 1650
  36. 1150
  37. 3750
  38. 1300
  39. 170
  40. 70

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