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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 845 · 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. 1.45 × 5 =
  2. 2.75 × 5 =
  3. 3.49 × 5 =
  4. 4.91 × 50 =
  5. 5.72 × 5 =
  6. 6.21 × 5 =
  7. 7.25 × 50 =
  8. 8.59 × 5 =
  9. 9.47 × 5 =
  10. 10.17 × 5 =
  11. 11.27 × 50 =
  12. 12.54 × 5 =
  13. 13.30 × 5 =
  14. 14.34 × 50 =
  15. 15.76 × 5 =
  16. 16.57 × 50 =
  17. 17.12 × 50 =
  18. 18.73 × 5 =
  19. 19.80 × 50 =
  20. 20.48 × 50 =
  21. 21.23 × 50 =
  22. 22.26 × 50 =
  23. 23.89 × 50 =
  24. 24.18 × 50 =
  25. 25.53 × 50 =
  26. 26.47 × 50 =
  27. 27.12 × 50 =
  28. 28.59 × 50 =
  29. 29.59 × 50 =
  30. 30.12 × 5 =
  31. 31.32 × 5 =
  32. 32.48 × 5 =
  33. 33.13 × 5 =
  34. 34.13 × 5 =
  35. 35.75 × 5 =
  36. 36.26 × 5 =
  37. 37.91 × 50 =
  38. 38.23 × 5 =
  39. 39.63 × 50 =
  40. 40.69 × 50 =

Answer key

  1. 225
  2. 375
  3. 245
  4. 4550
  5. 360
  6. 105
  7. 1250
  8. 295
  9. 235
  10. 85
  11. 1350
  12. 270
  13. 150
  14. 1700
  15. 380
  16. 2850
  17. 600
  18. 365
  19. 4000
  20. 2400
  21. 1150
  22. 1300
  23. 4450
  24. 900
  25. 2650
  26. 2350
  27. 600
  28. 2950
  29. 2950
  30. 60
  31. 160
  32. 240
  33. 65
  34. 65
  35. 375
  36. 130
  37. 4550
  38. 115
  39. 3150
  40. 3450

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