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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 261 · 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. 1.21 × 5 =
  2. 2.56 × 50 =
  3. 3.76 × 5 =
  4. 4.40 × 5 =
  5. 5.60 × 50 =
  6. 6.30 × 5 =
  7. 7.26 × 5 =
  8. 8.87 × 50 =
  9. 9.33 × 50 =
  10. 10.35 × 50 =
  11. 11.22 × 50 =
  12. 12.42 × 5 =
  13. 13.19 × 50 =
  14. 14.42 × 5 =
  15. 15.67 × 5 =
  16. 16.27 × 5 =
  17. 17.90 × 5 =
  18. 18.25 × 5 =
  19. 19.14 × 5 =
  20. 20.73 × 5 =
  21. 21.43 × 5 =
  22. 22.12 × 5 =
  23. 23.54 × 5 =
  24. 24.47 × 50 =
  25. 25.63 × 5 =
  26. 26.17 × 50 =
  27. 27.35 × 5 =
  28. 28.13 × 5 =
  29. 29.65 × 50 =
  30. 30.36 × 5 =
  31. 31.60 × 50 =
  32. 32.50 × 5 =
  33. 33.43 × 5 =
  34. 34.84 × 5 =
  35. 35.48 × 5 =
  36. 36.60 × 50 =
  37. 37.22 × 50 =
  38. 38.69 × 50 =
  39. 39.45 × 50 =
  40. 40.29 × 50 =

Answer key

  1. 105
  2. 2800
  3. 380
  4. 200
  5. 3000
  6. 150
  7. 130
  8. 4350
  9. 1650
  10. 1750
  11. 1100
  12. 210
  13. 950
  14. 210
  15. 335
  16. 135
  17. 450
  18. 125
  19. 70
  20. 365
  21. 215
  22. 60
  23. 270
  24. 2350
  25. 315
  26. 850
  27. 175
  28. 65
  29. 3250
  30. 180
  31. 3000
  32. 250
  33. 215
  34. 420
  35. 240
  36. 3000
  37. 1100
  38. 3450
  39. 2250
  40. 1450

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