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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 780 · 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. 1.80 × 5 =
  2. 2.40 × 5 =
  3. 3.37 × 50 =
  4. 4.50 × 50 =
  5. 5.42 × 50 =
  6. 6.58 × 5 =
  7. 7.31 × 5 =
  8. 8.72 × 5 =
  9. 9.91 × 50 =
  10. 10.26 × 5 =
  11. 11.93 × 50 =
  12. 12.14 × 50 =
  13. 13.78 × 50 =
  14. 14.51 × 50 =
  15. 15.89 × 5 =
  16. 16.79 × 50 =
  17. 17.89 × 5 =
  18. 18.62 × 5 =
  19. 19.87 × 5 =
  20. 20.30 × 50 =
  21. 21.32 × 50 =
  22. 22.80 × 50 =
  23. 23.55 × 5 =
  24. 24.34 × 5 =
  25. 25.92 × 50 =
  26. 26.50 × 5 =
  27. 27.61 × 5 =
  28. 28.57 × 50 =
  29. 29.41 × 50 =
  30. 30.43 × 50 =
  31. 31.68 × 5 =
  32. 32.22 × 50 =
  33. 33.79 × 50 =
  34. 34.45 × 5 =
  35. 35.36 × 50 =
  36. 36.26 × 50 =
  37. 37.85 × 5 =
  38. 38.97 × 5 =
  39. 39.14 × 5 =
  40. 40.23 × 5 =

Answer key

  1. 400
  2. 200
  3. 1850
  4. 2500
  5. 2100
  6. 290
  7. 155
  8. 360
  9. 4550
  10. 130
  11. 4650
  12. 700
  13. 3900
  14. 2550
  15. 445
  16. 3950
  17. 445
  18. 310
  19. 435
  20. 1500
  21. 1600
  22. 4000
  23. 275
  24. 170
  25. 4600
  26. 250
  27. 305
  28. 2850
  29. 2050
  30. 2150
  31. 340
  32. 1100
  33. 3950
  34. 225
  35. 1800
  36. 1300
  37. 425
  38. 485
  39. 70
  40. 115

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