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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 914 · 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. 1.49 × 50 =
  2. 2.61 × 5 =
  3. 3.20 × 5 =
  4. 4.18 × 5 =
  5. 5.76 × 50 =
  6. 6.56 × 5 =
  7. 7.47 × 50 =
  8. 8.85 × 5 =
  9. 9.64 × 5 =
  10. 10.86 × 5 =
  11. 11.68 × 5 =
  12. 12.41 × 5 =
  13. 13.30 × 50 =
  14. 14.98 × 5 =
  15. 15.68 × 5 =
  16. 16.62 × 5 =
  17. 17.52 × 5 =
  18. 18.28 × 50 =
  19. 19.76 × 50 =
  20. 20.89 × 5 =
  21. 21.58 × 5 =
  22. 22.31 × 5 =
  23. 23.87 × 50 =
  24. 24.97 × 50 =
  25. 25.28 × 5 =
  26. 26.59 × 5 =
  27. 27.13 × 50 =
  28. 28.70 × 5 =
  29. 29.53 × 5 =
  30. 30.33 × 50 =
  31. 31.77 × 5 =
  32. 32.52 × 5 =
  33. 33.21 × 50 =
  34. 34.49 × 50 =
  35. 35.54 × 5 =
  36. 36.17 × 50 =
  37. 37.25 × 50 =
  38. 38.90 × 5 =
  39. 39.22 × 5 =
  40. 40.51 × 5 =

Answer key

  1. 2450
  2. 305
  3. 100
  4. 90
  5. 3800
  6. 280
  7. 2350
  8. 425
  9. 320
  10. 430
  11. 340
  12. 205
  13. 1500
  14. 490
  15. 340
  16. 310
  17. 260
  18. 1400
  19. 3800
  20. 445
  21. 290
  22. 155
  23. 4350
  24. 4850
  25. 140
  26. 295
  27. 650
  28. 350
  29. 265
  30. 1650
  31. 385
  32. 260
  33. 1050
  34. 2450
  35. 270
  36. 850
  37. 1250
  38. 450
  39. 110
  40. 255

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