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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 991 · 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. 1.20 × 5 =
  2. 2.45 × 50 =
  3. 3.64 × 50 =
  4. 4.64 × 5 =
  5. 5.79 × 5 =
  6. 6.71 × 5 =
  7. 7.48 × 5 =
  8. 8.64 × 50 =
  9. 9.91 × 50 =
  10. 10.64 × 50 =
  11. 11.59 × 50 =
  12. 12.27 × 50 =
  13. 13.22 × 50 =
  14. 14.24 × 50 =
  15. 15.77 × 5 =
  16. 16.90 × 50 =
  17. 17.74 × 50 =
  18. 18.64 × 5 =
  19. 19.47 × 5 =
  20. 20.42 × 50 =
  21. 21.61 × 50 =
  22. 22.47 × 50 =
  23. 23.32 × 5 =
  24. 24.78 × 50 =
  25. 25.41 × 50 =
  26. 26.49 × 5 =
  27. 27.18 × 5 =
  28. 28.22 × 5 =
  29. 29.74 × 5 =
  30. 30.29 × 5 =
  31. 31.42 × 5 =
  32. 32.96 × 50 =
  33. 33.67 × 5 =
  34. 34.33 × 50 =
  35. 35.50 × 5 =
  36. 36.84 × 5 =
  37. 37.78 × 50 =
  38. 38.37 × 5 =
  39. 39.59 × 50 =
  40. 40.46 × 50 =

Answer key

  1. 100
  2. 2250
  3. 3200
  4. 320
  5. 395
  6. 355
  7. 240
  8. 3200
  9. 4550
  10. 3200
  11. 2950
  12. 1350
  13. 1100
  14. 1200
  15. 385
  16. 4500
  17. 3700
  18. 320
  19. 235
  20. 2100
  21. 3050
  22. 2350
  23. 160
  24. 3900
  25. 2050
  26. 245
  27. 90
  28. 110
  29. 370
  30. 145
  31. 210
  32. 4800
  33. 335
  34. 1650
  35. 250
  36. 420
  37. 3900
  38. 185
  39. 2950
  40. 2300

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