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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 611 · 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. 1.29 × 5 =
  2. 2.35 × 5 =
  3. 3.74 × 50 =
  4. 4.49 × 5 =
  5. 5.49 × 50 =
  6. 6.84 × 5 =
  7. 7.93 × 50 =
  8. 8.22 × 5 =
  9. 9.13 × 50 =
  10. 10.89 × 50 =
  11. 11.47 × 50 =
  12. 12.91 × 50 =
  13. 13.14 × 5 =
  14. 14.68 × 50 =
  15. 15.89 × 5 =
  16. 16.23 × 5 =
  17. 17.44 × 50 =
  18. 18.81 × 50 =
  19. 19.62 × 50 =
  20. 20.53 × 5 =
  21. 21.81 × 50 =
  22. 22.97 × 5 =
  23. 23.37 × 50 =
  24. 24.53 × 50 =
  25. 25.66 × 5 =
  26. 26.19 × 5 =
  27. 27.14 × 50 =
  28. 28.63 × 5 =
  29. 29.91 × 5 =
  30. 30.26 × 50 =
  31. 31.38 × 5 =
  32. 32.37 × 5 =
  33. 33.40 × 50 =
  34. 34.28 × 5 =
  35. 35.32 × 50 =
  36. 36.90 × 5 =
  37. 37.63 × 50 =
  38. 38.95 × 50 =
  39. 39.24 × 5 =
  40. 40.59 × 5 =

Answer key

  1. 145
  2. 175
  3. 3700
  4. 245
  5. 2450
  6. 420
  7. 4650
  8. 110
  9. 650
  10. 4450
  11. 2350
  12. 4550
  13. 70
  14. 3400
  15. 445
  16. 115
  17. 2200
  18. 4050
  19. 3100
  20. 265
  21. 4050
  22. 485
  23. 1850
  24. 2650
  25. 330
  26. 95
  27. 700
  28. 315
  29. 455
  30. 1300
  31. 190
  32. 185
  33. 2000
  34. 140
  35. 1600
  36. 450
  37. 3150
  38. 4750
  39. 120
  40. 295

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