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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 716 · 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. 1.78 × 5 =
  2. 2.17 × 5 =
  3. 3.27 × 5 =
  4. 4.47 × 5 =
  5. 5.24 × 50 =
  6. 6.30 × 5 =
  7. 7.26 × 5 =
  8. 8.37 × 5 =
  9. 9.24 × 5 =
  10. 10.86 × 5 =
  11. 11.92 × 5 =
  12. 12.52 × 5 =
  13. 13.17 × 5 =
  14. 14.35 × 5 =
  15. 15.75 × 50 =
  16. 16.20 × 5 =
  17. 17.68 × 50 =
  18. 18.76 × 50 =
  19. 19.13 × 5 =
  20. 20.52 × 5 =
  21. 21.42 × 50 =
  22. 22.17 × 5 =
  23. 23.40 × 50 =
  24. 24.86 × 50 =
  25. 25.77 × 50 =
  26. 26.82 × 50 =
  27. 27.81 × 50 =
  28. 28.28 × 5 =
  29. 29.19 × 50 =
  30. 30.95 × 50 =
  31. 31.79 × 5 =
  32. 32.68 × 50 =
  33. 33.40 × 50 =
  34. 34.92 × 5 =
  35. 35.67 × 50 =
  36. 36.18 × 5 =
  37. 37.27 × 50 =
  38. 38.97 × 50 =
  39. 39.33 × 5 =
  40. 40.60 × 50 =

Answer key

  1. 390
  2. 85
  3. 135
  4. 235
  5. 1200
  6. 150
  7. 130
  8. 185
  9. 120
  10. 430
  11. 460
  12. 260
  13. 85
  14. 175
  15. 3750
  16. 100
  17. 3400
  18. 3800
  19. 65
  20. 260
  21. 2100
  22. 85
  23. 2000
  24. 4300
  25. 3850
  26. 4100
  27. 4050
  28. 140
  29. 950
  30. 4750
  31. 395
  32. 3400
  33. 2000
  34. 460
  35. 3350
  36. 90
  37. 1350
  38. 4850
  39. 165
  40. 3000

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