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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 930 · 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. 1.74 × 5 =
  2. 2.70 × 5 =
  3. 3.46 × 5 =
  4. 4.36 × 50 =
  5. 5.75 × 50 =
  6. 6.76 × 5 =
  7. 7.64 × 50 =
  8. 8.30 × 5 =
  9. 9.74 × 5 =
  10. 10.14 × 50 =
  11. 11.73 × 5 =
  12. 12.48 × 50 =
  13. 13.56 × 5 =
  14. 14.41 × 50 =
  15. 15.28 × 5 =
  16. 16.32 × 50 =
  17. 17.31 × 50 =
  18. 18.74 × 5 =
  19. 19.12 × 5 =
  20. 20.54 × 5 =
  21. 21.34 × 5 =
  22. 22.95 × 5 =
  23. 23.44 × 50 =
  24. 24.23 × 5 =
  25. 25.77 × 5 =
  26. 26.85 × 5 =
  27. 27.36 × 50 =
  28. 28.24 × 50 =
  29. 29.48 × 5 =
  30. 30.32 × 5 =
  31. 31.62 × 50 =
  32. 32.26 × 5 =
  33. 33.12 × 50 =
  34. 34.50 × 5 =
  35. 35.55 × 5 =
  36. 36.36 × 5 =
  37. 37.20 × 5 =
  38. 38.43 × 50 =
  39. 39.24 × 5 =
  40. 40.81 × 50 =

Answer key

  1. 370
  2. 350
  3. 230
  4. 1800
  5. 3750
  6. 380
  7. 3200
  8. 150
  9. 370
  10. 700
  11. 365
  12. 2400
  13. 280
  14. 2050
  15. 140
  16. 1600
  17. 1550
  18. 370
  19. 60
  20. 270
  21. 170
  22. 475
  23. 2200
  24. 115
  25. 385
  26. 425
  27. 1800
  28. 1200
  29. 240
  30. 160
  31. 3100
  32. 130
  33. 600
  34. 250
  35. 275
  36. 180
  37. 100
  38. 2150
  39. 120
  40. 4050

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