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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 817 · 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. 1.93 × 5 =
  2. 2.91 × 50 =
  3. 3.23 × 50 =
  4. 4.18 × 50 =
  5. 5.30 × 50 =
  6. 6.80 × 50 =
  7. 7.31 × 5 =
  8. 8.89 × 50 =
  9. 9.29 × 5 =
  10. 10.92 × 50 =
  11. 11.49 × 50 =
  12. 12.34 × 5 =
  13. 13.66 × 50 =
  14. 14.89 × 5 =
  15. 15.78 × 5 =
  16. 16.67 × 5 =
  17. 17.72 × 50 =
  18. 18.21 × 50 =
  19. 19.14 × 50 =
  20. 20.62 × 5 =
  21. 21.56 × 5 =
  22. 22.31 × 5 =
  23. 23.32 × 50 =
  24. 24.54 × 5 =
  25. 25.15 × 5 =
  26. 26.67 × 5 =
  27. 27.68 × 5 =
  28. 28.36 × 5 =
  29. 29.75 × 5 =
  30. 30.35 × 5 =
  31. 31.13 × 50 =
  32. 32.51 × 5 =
  33. 33.45 × 50 =
  34. 34.70 × 5 =
  35. 35.37 × 5 =
  36. 36.83 × 5 =
  37. 37.23 × 5 =
  38. 38.14 × 5 =
  39. 39.60 × 5 =
  40. 40.94 × 50 =

Answer key

  1. 465
  2. 4550
  3. 1150
  4. 900
  5. 1500
  6. 4000
  7. 155
  8. 4450
  9. 145
  10. 4600
  11. 2450
  12. 170
  13. 3300
  14. 445
  15. 390
  16. 335
  17. 3600
  18. 1050
  19. 700
  20. 310
  21. 280
  22. 155
  23. 1600
  24. 270
  25. 75
  26. 335
  27. 340
  28. 180
  29. 375
  30. 175
  31. 650
  32. 255
  33. 2250
  34. 350
  35. 185
  36. 415
  37. 115
  38. 70
  39. 300
  40. 4700

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