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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 841 · 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. 1.70 × 5 =
  2. 2.25 × 5 =
  3. 3.98 × 50 =
  4. 4.55 × 50 =
  5. 5.39 × 50 =
  6. 6.23 × 5 =
  7. 7.72 × 5 =
  8. 8.95 × 5 =
  9. 9.89 × 5 =
  10. 10.34 × 5 =
  11. 11.29 × 50 =
  12. 12.18 × 50 =
  13. 13.98 × 50 =
  14. 14.53 × 50 =
  15. 15.18 × 50 =
  16. 16.78 × 5 =
  17. 17.64 × 50 =
  18. 18.12 × 50 =
  19. 19.37 × 50 =
  20. 20.20 × 50 =
  21. 21.61 × 5 =
  22. 22.86 × 50 =
  23. 23.26 × 50 =
  24. 24.62 × 50 =
  25. 25.47 × 5 =
  26. 26.91 × 50 =
  27. 27.82 × 5 =
  28. 28.98 × 50 =
  29. 29.29 × 50 =
  30. 30.78 × 50 =
  31. 31.93 × 5 =
  32. 32.65 × 5 =
  33. 33.95 × 5 =
  34. 34.26 × 5 =
  35. 35.24 × 50 =
  36. 36.45 × 5 =
  37. 37.40 × 5 =
  38. 38.16 × 5 =
  39. 39.31 × 5 =
  40. 40.23 × 5 =

Answer key

  1. 350
  2. 125
  3. 4900
  4. 2750
  5. 1950
  6. 115
  7. 360
  8. 475
  9. 445
  10. 170
  11. 1450
  12. 900
  13. 4900
  14. 2650
  15. 900
  16. 390
  17. 3200
  18. 600
  19. 1850
  20. 1000
  21. 305
  22. 4300
  23. 1300
  24. 3100
  25. 235
  26. 4550
  27. 410
  28. 4900
  29. 1450
  30. 3900
  31. 465
  32. 325
  33. 475
  34. 130
  35. 1200
  36. 225
  37. 200
  38. 80
  39. 155
  40. 115

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