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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 431 · 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. 1.21 × 5 =
  2. 2.21 × 50 =
  3. 3.28 × 50 =
  4. 4.93 × 50 =
  5. 5.30 × 50 =
  6. 6.92 × 50 =
  7. 7.64 × 5 =
  8. 8.96 × 50 =
  9. 9.13 × 5 =
  10. 10.23 × 50 =
  11. 11.38 × 50 =
  12. 12.44 × 50 =
  13. 13.48 × 50 =
  14. 14.93 × 50 =
  15. 15.47 × 5 =
  16. 16.15 × 5 =
  17. 17.82 × 5 =
  18. 18.48 × 50 =
  19. 19.31 × 5 =
  20. 20.61 × 5 =
  21. 21.80 × 50 =
  22. 22.53 × 5 =
  23. 23.42 × 50 =
  24. 24.35 × 50 =
  25. 25.46 × 50 =
  26. 26.79 × 5 =
  27. 27.75 × 50 =
  28. 28.88 × 5 =
  29. 29.28 × 50 =
  30. 30.87 × 5 =
  31. 31.23 × 5 =
  32. 32.59 × 5 =
  33. 33.41 × 5 =
  34. 34.56 × 5 =
  35. 35.36 × 50 =
  36. 36.57 × 50 =
  37. 37.18 × 50 =
  38. 38.89 × 50 =
  39. 39.40 × 5 =
  40. 40.20 × 5 =

Answer key

  1. 105
  2. 1050
  3. 1400
  4. 4650
  5. 1500
  6. 4600
  7. 320
  8. 4800
  9. 65
  10. 1150
  11. 1900
  12. 2200
  13. 2400
  14. 4650
  15. 235
  16. 75
  17. 410
  18. 2400
  19. 155
  20. 305
  21. 4000
  22. 265
  23. 2100
  24. 1750
  25. 2300
  26. 395
  27. 3750
  28. 440
  29. 1400
  30. 435
  31. 115
  32. 295
  33. 205
  34. 280
  35. 1800
  36. 2850
  37. 900
  38. 4450
  39. 200
  40. 100

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