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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 852 · 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. 1.22 × 50 =
  2. 2.37 × 5 =
  3. 3.43 × 50 =
  4. 4.21 × 50 =
  5. 5.33 × 5 =
  6. 6.15 × 50 =
  7. 7.39 × 50 =
  8. 8.57 × 50 =
  9. 9.79 × 5 =
  10. 10.89 × 5 =
  11. 11.12 × 5 =
  12. 12.13 × 5 =
  13. 13.73 × 5 =
  14. 14.31 × 5 =
  15. 15.20 × 50 =
  16. 16.20 × 50 =
  17. 17.27 × 5 =
  18. 18.41 × 5 =
  19. 19.60 × 50 =
  20. 20.28 × 50 =
  21. 21.63 × 5 =
  22. 22.51 × 50 =
  23. 23.19 × 50 =
  24. 24.35 × 50 =
  25. 25.40 × 5 =
  26. 26.79 × 5 =
  27. 27.56 × 5 =
  28. 28.34 × 5 =
  29. 29.52 × 5 =
  30. 30.86 × 5 =
  31. 31.13 × 5 =
  32. 32.59 × 5 =
  33. 33.88 × 5 =
  34. 34.37 × 50 =
  35. 35.28 × 5 =
  36. 36.97 × 50 =
  37. 37.31 × 50 =
  38. 38.20 × 50 =
  39. 39.51 × 5 =
  40. 40.68 × 50 =

Answer key

  1. 1100
  2. 185
  3. 2150
  4. 1050
  5. 165
  6. 750
  7. 1950
  8. 2850
  9. 395
  10. 445
  11. 60
  12. 65
  13. 365
  14. 155
  15. 1000
  16. 1000
  17. 135
  18. 205
  19. 3000
  20. 1400
  21. 315
  22. 2550
  23. 950
  24. 1750
  25. 200
  26. 395
  27. 280
  28. 170
  29. 260
  30. 430
  31. 65
  32. 295
  33. 440
  34. 1850
  35. 140
  36. 4850
  37. 1550
  38. 1000
  39. 255
  40. 3400

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