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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 834 · 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. 1.44 × 5 =
  2. 2.14 × 50 =
  3. 3.59 × 50 =
  4. 4.80 × 50 =
  5. 5.18 × 5 =
  6. 6.31 × 5 =
  7. 7.36 × 5 =
  8. 8.69 × 50 =
  9. 9.89 × 5 =
  10. 10.36 × 5 =
  11. 11.21 × 5 =
  12. 12.65 × 50 =
  13. 13.57 × 50 =
  14. 14.68 × 5 =
  15. 15.17 × 50 =
  16. 16.76 × 50 =
  17. 17.34 × 5 =
  18. 18.27 × 5 =
  19. 19.27 × 5 =
  20. 20.47 × 5 =
  21. 21.61 × 50 =
  22. 22.22 × 5 =
  23. 23.55 × 50 =
  24. 24.93 × 5 =
  25. 25.96 × 50 =
  26. 26.77 × 5 =
  27. 27.20 × 5 =
  28. 28.82 × 50 =
  29. 29.13 × 5 =
  30. 30.20 × 50 =
  31. 31.26 × 5 =
  32. 32.94 × 5 =
  33. 33.58 × 5 =
  34. 34.70 × 50 =
  35. 35.80 × 5 =
  36. 36.95 × 5 =
  37. 37.96 × 50 =
  38. 38.77 × 5 =
  39. 39.61 × 50 =
  40. 40.51 × 5 =

Answer key

  1. 220
  2. 700
  3. 2950
  4. 4000
  5. 90
  6. 155
  7. 180
  8. 3450
  9. 445
  10. 180
  11. 105
  12. 3250
  13. 2850
  14. 340
  15. 850
  16. 3800
  17. 170
  18. 135
  19. 135
  20. 235
  21. 3050
  22. 110
  23. 2750
  24. 465
  25. 4800
  26. 385
  27. 100
  28. 4100
  29. 65
  30. 1000
  31. 130
  32. 470
  33. 290
  34. 3500
  35. 400
  36. 475
  37. 4800
  38. 385
  39. 3050
  40. 255

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