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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 15 · 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. 1.93 × 5 =
  2. 2.56 × 50 =
  3. 3.36 × 5 =
  4. 4.35 × 5 =
  5. 5.49 × 50 =
  6. 6.29 × 5 =
  7. 7.13 × 5 =
  8. 8.33 × 50 =
  9. 9.56 × 50 =
  10. 10.15 × 5 =
  11. 11.28 × 50 =
  12. 12.35 × 5 =
  13. 13.65 × 5 =
  14. 14.95 × 5 =
  15. 15.90 × 5 =
  16. 16.54 × 50 =
  17. 17.87 × 5 =
  18. 18.95 × 5 =
  19. 19.97 × 5 =
  20. 20.60 × 5 =
  21. 21.46 × 5 =
  22. 22.34 × 5 =
  23. 23.73 × 5 =
  24. 24.84 × 50 =
  25. 25.65 × 5 =
  26. 26.98 × 5 =
  27. 27.76 × 5 =
  28. 28.39 × 50 =
  29. 29.75 × 50 =
  30. 30.68 × 5 =
  31. 31.40 × 5 =
  32. 32.27 × 50 =
  33. 33.79 × 5 =
  34. 34.86 × 50 =
  35. 35.84 × 5 =
  36. 36.18 × 5 =
  37. 37.35 × 50 =
  38. 38.41 × 5 =
  39. 39.86 × 5 =
  40. 40.50 × 50 =

Answer key

  1. 465
  2. 2800
  3. 180
  4. 175
  5. 2450
  6. 145
  7. 65
  8. 1650
  9. 2800
  10. 75
  11. 1400
  12. 175
  13. 325
  14. 475
  15. 450
  16. 2700
  17. 435
  18. 475
  19. 485
  20. 300
  21. 230
  22. 170
  23. 365
  24. 4200
  25. 325
  26. 490
  27. 380
  28. 1950
  29. 3750
  30. 340
  31. 200
  32. 1350
  33. 395
  34. 4300
  35. 420
  36. 90
  37. 1750
  38. 205
  39. 430
  40. 2500

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