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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 993 · 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. 1.86 × 5 =
  2. 2.18 × 50 =
  3. 3.67 × 50 =
  4. 4.50 × 50 =
  5. 5.29 × 50 =
  6. 6.90 × 50 =
  7. 7.47 × 5 =
  8. 8.90 × 50 =
  9. 9.22 × 50 =
  10. 10.49 × 50 =
  11. 11.84 × 50 =
  12. 12.91 × 50 =
  13. 13.78 × 5 =
  14. 14.34 × 5 =
  15. 15.52 × 50 =
  16. 16.45 × 50 =
  17. 17.67 × 5 =
  18. 18.45 × 5 =
  19. 19.72 × 50 =
  20. 20.27 × 50 =
  21. 21.32 × 50 =
  22. 22.32 × 50 =
  23. 23.93 × 50 =
  24. 24.20 × 50 =
  25. 25.45 × 50 =
  26. 26.49 × 5 =
  27. 27.49 × 5 =
  28. 28.90 × 5 =
  29. 29.18 × 5 =
  30. 30.21 × 50 =
  31. 31.77 × 5 =
  32. 32.69 × 50 =
  33. 33.22 × 5 =
  34. 34.90 × 5 =
  35. 35.47 × 5 =
  36. 36.58 × 50 =
  37. 37.32 × 5 =
  38. 38.94 × 5 =
  39. 39.68 × 5 =
  40. 40.16 × 5 =

Answer key

  1. 430
  2. 900
  3. 3350
  4. 2500
  5. 1450
  6. 4500
  7. 235
  8. 4500
  9. 1100
  10. 2450
  11. 4200
  12. 4550
  13. 390
  14. 170
  15. 2600
  16. 2250
  17. 335
  18. 225
  19. 3600
  20. 1350
  21. 1600
  22. 1600
  23. 4650
  24. 1000
  25. 2250
  26. 245
  27. 245
  28. 450
  29. 90
  30. 1050
  31. 385
  32. 3450
  33. 110
  34. 450
  35. 235
  36. 2900
  37. 160
  38. 470
  39. 340
  40. 80

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