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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 959 · 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. 1.71 × 5 =
  2. 2.41 × 5 =
  3. 3.19 × 5 =
  4. 4.84 × 5 =
  5. 5.95 × 50 =
  6. 6.19 × 50 =
  7. 7.14 × 5 =
  8. 8.48 × 5 =
  9. 9.38 × 50 =
  10. 10.58 × 50 =
  11. 11.13 × 50 =
  12. 12.65 × 5 =
  13. 13.68 × 5 =
  14. 14.66 × 5 =
  15. 15.96 × 50 =
  16. 16.47 × 5 =
  17. 17.37 × 5 =
  18. 18.12 × 5 =
  19. 19.21 × 5 =
  20. 20.40 × 50 =
  21. 21.29 × 50 =
  22. 22.31 × 50 =
  23. 23.67 × 50 =
  24. 24.31 × 50 =
  25. 25.90 × 5 =
  26. 26.32 × 50 =
  27. 27.71 × 5 =
  28. 28.58 × 50 =
  29. 29.68 × 5 =
  30. 30.55 × 5 =
  31. 31.27 × 5 =
  32. 32.15 × 5 =
  33. 33.12 × 50 =
  34. 34.29 × 50 =
  35. 35.78 × 50 =
  36. 36.90 × 50 =
  37. 37.63 × 50 =
  38. 38.83 × 50 =
  39. 39.96 × 50 =
  40. 40.38 × 50 =

Answer key

  1. 355
  2. 205
  3. 95
  4. 420
  5. 4750
  6. 950
  7. 70
  8. 240
  9. 1900
  10. 2900
  11. 650
  12. 325
  13. 340
  14. 330
  15. 4800
  16. 235
  17. 185
  18. 60
  19. 105
  20. 2000
  21. 1450
  22. 1550
  23. 3350
  24. 1550
  25. 450
  26. 1600
  27. 355
  28. 2900
  29. 340
  30. 275
  31. 135
  32. 75
  33. 600
  34. 1450
  35. 3900
  36. 4500
  37. 3150
  38. 4150
  39. 4800
  40. 1900

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