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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 881 · 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. 1.86 × 5 =
  2. 2.23 × 5 =
  3. 3.50 × 5 =
  4. 4.26 × 5 =
  5. 5.81 × 50 =
  6. 6.42 × 50 =
  7. 7.14 × 5 =
  8. 8.80 × 50 =
  9. 9.83 × 5 =
  10. 10.74 × 5 =
  11. 11.32 × 5 =
  12. 12.41 × 5 =
  13. 13.65 × 50 =
  14. 14.70 × 5 =
  15. 15.69 × 50 =
  16. 16.69 × 5 =
  17. 17.16 × 50 =
  18. 18.85 × 50 =
  19. 19.47 × 5 =
  20. 20.32 × 5 =
  21. 21.67 × 50 =
  22. 22.58 × 50 =
  23. 23.49 × 50 =
  24. 24.31 × 50 =
  25. 25.38 × 50 =
  26. 26.82 × 50 =
  27. 27.16 × 50 =
  28. 28.24 × 50 =
  29. 29.28 × 50 =
  30. 30.56 × 5 =
  31. 31.52 × 5 =
  32. 32.17 × 5 =
  33. 33.33 × 5 =
  34. 34.94 × 5 =
  35. 35.64 × 5 =
  36. 36.51 × 50 =
  37. 37.95 × 5 =
  38. 38.25 × 50 =
  39. 39.36 × 5 =
  40. 40.44 × 5 =

Answer key

  1. 430
  2. 115
  3. 250
  4. 130
  5. 4050
  6. 2100
  7. 70
  8. 4000
  9. 415
  10. 370
  11. 160
  12. 205
  13. 3250
  14. 350
  15. 3450
  16. 345
  17. 800
  18. 4250
  19. 235
  20. 160
  21. 3350
  22. 2900
  23. 2450
  24. 1550
  25. 1900
  26. 4100
  27. 800
  28. 1200
  29. 1400
  30. 280
  31. 260
  32. 85
  33. 165
  34. 470
  35. 320
  36. 2550
  37. 475
  38. 1250
  39. 180
  40. 220

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