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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 981 · 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. 1.24 × 50 =
  2. 2.15 × 5 =
  3. 3.79 × 50 =
  4. 4.62 × 5 =
  5. 5.66 × 5 =
  6. 6.21 × 50 =
  7. 7.28 × 5 =
  8. 8.52 × 5 =
  9. 9.52 × 5 =
  10. 10.15 × 50 =
  11. 11.40 × 50 =
  12. 12.95 × 50 =
  13. 13.98 × 5 =
  14. 14.14 × 5 =
  15. 15.88 × 5 =
  16. 16.56 × 50 =
  17. 17.16 × 50 =
  18. 18.23 × 5 =
  19. 19.98 × 5 =
  20. 20.60 × 50 =
  21. 21.73 × 5 =
  22. 22.82 × 50 =
  23. 23.55 × 5 =
  24. 24.65 × 50 =
  25. 25.25 × 5 =
  26. 26.61 × 5 =
  27. 27.46 × 5 =
  28. 28.20 × 50 =
  29. 29.49 × 50 =
  30. 30.35 × 5 =
  31. 31.94 × 5 =
  32. 32.51 × 5 =
  33. 33.19 × 5 =
  34. 34.24 × 5 =
  35. 35.80 × 5 =
  36. 36.28 × 5 =
  37. 37.23 × 50 =
  38. 38.69 × 5 =
  39. 39.36 × 50 =
  40. 40.78 × 5 =

Answer key

  1. 1200
  2. 75
  3. 3950
  4. 310
  5. 330
  6. 1050
  7. 140
  8. 260
  9. 260
  10. 750
  11. 2000
  12. 4750
  13. 490
  14. 70
  15. 440
  16. 2800
  17. 800
  18. 115
  19. 490
  20. 3000
  21. 365
  22. 4100
  23. 275
  24. 3250
  25. 125
  26. 305
  27. 230
  28. 1000
  29. 2450
  30. 175
  31. 470
  32. 255
  33. 95
  34. 120
  35. 400
  36. 140
  37. 1150
  38. 345
  39. 1800
  40. 390

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