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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 550 · 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. 2.76 × 5 =
  3. 3.44 × 5 =
  4. 4.41 × 50 =
  5. 5.90 × 5 =
  6. 6.33 × 50 =
  7. 7.13 × 5 =
  8. 8.40 × 5 =
  9. 9.93 × 5 =
  10. 10.83 × 5 =
  11. 11.40 × 50 =
  12. 12.26 × 5 =
  13. 13.84 × 50 =
  14. 14.62 × 5 =
  15. 15.26 × 5 =
  16. 16.44 × 50 =
  17. 17.13 × 5 =
  18. 18.92 × 5 =
  19. 19.87 × 50 =
  20. 20.28 × 50 =
  21. 21.44 × 50 =
  22. 22.68 × 50 =
  23. 23.63 × 5 =
  24. 24.23 × 50 =
  25. 25.76 × 50 =
  26. 26.62 × 50 =
  27. 27.13 × 50 =
  28. 28.72 × 50 =
  29. 29.77 × 5 =
  30. 30.74 × 50 =
  31. 31.43 × 5 =
  32. 32.31 × 50 =
  33. 33.19 × 50 =
  34. 34.84 × 50 =
  35. 35.18 × 5 =
  36. 36.16 × 50 =
  37. 37.22 × 50 =
  38. 38.46 × 50 =
  39. 39.23 × 50 =
  40. 40.61 × 5 =

Answer key

  1. 145
  2. 380
  3. 220
  4. 2050
  5. 450
  6. 1650
  7. 65
  8. 200
  9. 465
  10. 415
  11. 2000
  12. 130
  13. 4200
  14. 310
  15. 130
  16. 2200
  17. 65
  18. 460
  19. 4350
  20. 1400
  21. 2200
  22. 3400
  23. 315
  24. 1150
  25. 3800
  26. 3100
  27. 650
  28. 3600
  29. 385
  30. 3700
  31. 215
  32. 1550
  33. 950
  34. 4200
  35. 90
  36. 800
  37. 1100
  38. 2300
  39. 1150
  40. 305

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