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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 853 · 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. 1.87 × 5 =
  2. 2.15 × 50 =
  3. 3.60 × 50 =
  4. 4.14 × 50 =
  5. 5.19 × 50 =
  6. 6.62 × 5 =
  7. 7.72 × 50 =
  8. 8.94 × 5 =
  9. 9.98 × 50 =
  10. 10.93 × 50 =
  11. 11.84 × 50 =
  12. 12.27 × 50 =
  13. 13.23 × 50 =
  14. 14.45 × 50 =
  15. 15.57 × 50 =
  16. 16.25 × 50 =
  17. 17.32 × 5 =
  18. 18.50 × 5 =
  19. 19.50 × 50 =
  20. 20.13 × 5 =
  21. 21.37 × 5 =
  22. 22.29 × 5 =
  23. 23.28 × 50 =
  24. 24.33 × 50 =
  25. 25.45 × 50 =
  26. 26.57 × 5 =
  27. 27.53 × 5 =
  28. 28.15 × 50 =
  29. 29.48 × 5 =
  30. 30.59 × 50 =
  31. 31.86 × 50 =
  32. 32.22 × 5 =
  33. 33.52 × 5 =
  34. 34.71 × 5 =
  35. 35.41 × 5 =
  36. 36.23 × 50 =
  37. 37.52 × 5 =
  38. 38.12 × 5 =
  39. 39.62 × 50 =
  40. 40.90 × 50 =

Answer key

  1. 435
  2. 750
  3. 3000
  4. 700
  5. 950
  6. 310
  7. 3600
  8. 470
  9. 4900
  10. 4650
  11. 4200
  12. 1350
  13. 1150
  14. 2250
  15. 2850
  16. 1250
  17. 160
  18. 250
  19. 2500
  20. 65
  21. 185
  22. 145
  23. 1400
  24. 1650
  25. 2250
  26. 285
  27. 265
  28. 750
  29. 240
  30. 2950
  31. 4300
  32. 110
  33. 260
  34. 355
  35. 205
  36. 1150
  37. 260
  38. 60
  39. 3100
  40. 4500

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