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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 770 · 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. 1.17 × 5 =
  2. 2.79 × 5 =
  3. 3.16 × 5 =
  4. 4.56 × 50 =
  5. 5.90 × 5 =
  6. 6.92 × 50 =
  7. 7.45 × 50 =
  8. 8.64 × 5 =
  9. 9.71 × 50 =
  10. 10.39 × 50 =
  11. 11.98 × 50 =
  12. 12.44 × 5 =
  13. 13.28 × 5 =
  14. 14.97 × 50 =
  15. 15.88 × 5 =
  16. 16.63 × 5 =
  17. 17.28 × 50 =
  18. 18.94 × 50 =
  19. 19.49 × 5 =
  20. 20.59 × 50 =
  21. 21.87 × 5 =
  22. 22.68 × 5 =
  23. 23.65 × 5 =
  24. 24.34 × 5 =
  25. 25.52 × 50 =
  26. 26.55 × 50 =
  27. 27.79 × 50 =
  28. 28.65 × 50 =
  29. 29.30 × 50 =
  30. 30.17 × 50 =
  31. 31.18 × 50 =
  32. 32.86 × 50 =
  33. 33.80 × 50 =
  34. 34.69 × 50 =
  35. 35.80 × 50 =
  36. 36.38 × 5 =
  37. 37.16 × 5 =
  38. 38.60 × 5 =
  39. 39.96 × 5 =
  40. 40.54 × 50 =

Answer key

  1. 85
  2. 395
  3. 80
  4. 2800
  5. 450
  6. 4600
  7. 2250
  8. 320
  9. 3550
  10. 1950
  11. 4900
  12. 220
  13. 140
  14. 4850
  15. 440
  16. 315
  17. 1400
  18. 4700
  19. 245
  20. 2950
  21. 435
  22. 340
  23. 325
  24. 170
  25. 2600
  26. 2750
  27. 3950
  28. 3250
  29. 1500
  30. 850
  31. 900
  32. 4300
  33. 4000
  34. 3450
  35. 4000
  36. 190
  37. 80
  38. 300
  39. 480
  40. 2700

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