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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 976 · 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. 1.51 × 5 =
  2. 2.21 × 5 =
  3. 3.86 × 50 =
  4. 4.16 × 50 =
  5. 5.20 × 5 =
  6. 6.78 × 5 =
  7. 7.75 × 5 =
  8. 8.23 × 50 =
  9. 9.91 × 50 =
  10. 10.97 × 5 =
  11. 11.68 × 50 =
  12. 12.60 × 5 =
  13. 13.15 × 5 =
  14. 14.71 × 5 =
  15. 15.91 × 50 =
  16. 16.28 × 50 =
  17. 17.27 × 50 =
  18. 18.98 × 5 =
  19. 19.28 × 50 =
  20. 20.53 × 5 =
  21. 21.93 × 5 =
  22. 22.55 × 50 =
  23. 23.70 × 50 =
  24. 24.76 × 50 =
  25. 25.67 × 5 =
  26. 26.49 × 50 =
  27. 27.53 × 50 =
  28. 28.45 × 5 =
  29. 29.19 × 5 =
  30. 30.72 × 50 =
  31. 31.54 × 50 =
  32. 32.25 × 5 =
  33. 33.12 × 50 =
  34. 34.77 × 5 =
  35. 35.61 × 50 =
  36. 36.69 × 5 =
  37. 37.90 × 50 =
  38. 38.93 × 50 =
  39. 39.96 × 5 =
  40. 40.71 × 50 =

Answer key

  1. 255
  2. 105
  3. 4300
  4. 800
  5. 100
  6. 390
  7. 375
  8. 1150
  9. 4550
  10. 485
  11. 3400
  12. 300
  13. 75
  14. 355
  15. 4550
  16. 1400
  17. 1350
  18. 490
  19. 1400
  20. 265
  21. 465
  22. 2750
  23. 3500
  24. 3800
  25. 335
  26. 2450
  27. 2650
  28. 225
  29. 95
  30. 3600
  31. 2700
  32. 125
  33. 600
  34. 385
  35. 3050
  36. 345
  37. 4500
  38. 4650
  39. 480
  40. 3550

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