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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 344 · 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. 1.90 × 5 =
  2. 2.34 × 5 =
  3. 3.92 × 5 =
  4. 4.68 × 5 =
  5. 5.50 × 50 =
  6. 6.42 × 5 =
  7. 7.77 × 50 =
  8. 8.66 × 5 =
  9. 9.16 × 5 =
  10. 10.24 × 50 =
  11. 11.43 × 50 =
  12. 12.44 × 5 =
  13. 13.76 × 50 =
  14. 14.27 × 5 =
  15. 15.86 × 50 =
  16. 16.14 × 5 =
  17. 17.72 × 5 =
  18. 18.27 × 50 =
  19. 19.68 × 50 =
  20. 20.77 × 5 =
  21. 21.86 × 50 =
  22. 22.58 × 5 =
  23. 23.17 × 5 =
  24. 24.48 × 50 =
  25. 25.62 × 50 =
  26. 26.27 × 5 =
  27. 27.51 × 50 =
  28. 28.21 × 5 =
  29. 29.32 × 5 =
  30. 30.29 × 50 =
  31. 31.87 × 5 =
  32. 32.28 × 50 =
  33. 33.59 × 5 =
  34. 34.61 × 5 =
  35. 35.57 × 5 =
  36. 36.70 × 50 =
  37. 37.65 × 5 =
  38. 38.39 × 50 =
  39. 39.87 × 5 =
  40. 40.63 × 5 =

Answer key

  1. 450
  2. 170
  3. 460
  4. 340
  5. 2500
  6. 210
  7. 3850
  8. 330
  9. 80
  10. 1200
  11. 2150
  12. 220
  13. 3800
  14. 135
  15. 4300
  16. 70
  17. 360
  18. 1350
  19. 3400
  20. 385
  21. 4300
  22. 290
  23. 85
  24. 2400
  25. 3100
  26. 135
  27. 2550
  28. 105
  29. 160
  30. 1450
  31. 435
  32. 1400
  33. 295
  34. 305
  35. 285
  36. 3500
  37. 325
  38. 1950
  39. 435
  40. 315

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