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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 886 · 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. 1.92 × 50 =
  2. 2.65 × 5 =
  3. 3.78 × 50 =
  4. 4.56 × 5 =
  5. 5.19 × 50 =
  6. 6.92 × 5 =
  7. 7.76 × 5 =
  8. 8.58 × 5 =
  9. 9.83 × 50 =
  10. 10.59 × 5 =
  11. 11.96 × 5 =
  12. 12.51 × 5 =
  13. 13.78 × 5 =
  14. 14.91 × 5 =
  15. 15.29 × 50 =
  16. 16.50 × 5 =
  17. 17.90 × 5 =
  18. 18.27 × 50 =
  19. 19.22 × 5 =
  20. 20.95 × 5 =
  21. 21.70 × 50 =
  22. 22.87 × 50 =
  23. 23.36 × 5 =
  24. 24.65 × 5 =
  25. 25.22 × 5 =
  26. 26.22 × 5 =
  27. 27.87 × 50 =
  28. 28.23 × 5 =
  29. 29.93 × 5 =
  30. 30.75 × 50 =
  31. 31.97 × 50 =
  32. 32.14 × 50 =
  33. 33.32 × 50 =
  34. 34.29 × 5 =
  35. 35.26 × 5 =
  36. 36.49 × 50 =
  37. 37.19 × 50 =
  38. 38.22 × 5 =
  39. 39.60 × 50 =
  40. 40.65 × 5 =

Answer key

  1. 4600
  2. 325
  3. 3900
  4. 280
  5. 950
  6. 460
  7. 380
  8. 290
  9. 4150
  10. 295
  11. 480
  12. 255
  13. 390
  14. 455
  15. 1450
  16. 250
  17. 450
  18. 1350
  19. 110
  20. 475
  21. 3500
  22. 4350
  23. 180
  24. 325
  25. 110
  26. 110
  27. 4350
  28. 115
  29. 465
  30. 3750
  31. 4850
  32. 700
  33. 1600
  34. 145
  35. 130
  36. 2450
  37. 950
  38. 110
  39. 3000
  40. 325

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