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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 155 · 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. 1.56 × 5 =
  2. 2.47 × 5 =
  3. 3.86 × 50 =
  4. 4.31 × 5 =
  5. 5.49 × 50 =
  6. 6.31 × 50 =
  7. 7.48 × 5 =
  8. 8.52 × 5 =
  9. 9.81 × 50 =
  10. 10.39 × 50 =
  11. 11.28 × 50 =
  12. 12.53 × 5 =
  13. 13.32 × 5 =
  14. 14.52 × 50 =
  15. 15.79 × 50 =
  16. 16.29 × 5 =
  17. 17.21 × 50 =
  18. 18.50 × 5 =
  19. 19.91 × 50 =
  20. 20.84 × 5 =
  21. 21.40 × 5 =
  22. 22.46 × 5 =
  23. 23.31 × 5 =
  24. 24.85 × 5 =
  25. 25.71 × 50 =
  26. 26.78 × 50 =
  27. 27.43 × 5 =
  28. 28.40 × 50 =
  29. 29.79 × 5 =
  30. 30.92 × 5 =
  31. 31.64 × 5 =
  32. 32.97 × 50 =
  33. 33.29 × 5 =
  34. 34.47 × 50 =
  35. 35.44 × 5 =
  36. 36.21 × 50 =
  37. 37.63 × 50 =
  38. 38.13 × 5 =
  39. 39.92 × 50 =
  40. 40.38 × 5 =

Answer key

  1. 280
  2. 235
  3. 4300
  4. 155
  5. 2450
  6. 1550
  7. 240
  8. 260
  9. 4050
  10. 1950
  11. 1400
  12. 265
  13. 160
  14. 2600
  15. 3950
  16. 145
  17. 1050
  18. 250
  19. 4550
  20. 420
  21. 200
  22. 230
  23. 155
  24. 425
  25. 3550
  26. 3900
  27. 215
  28. 2000
  29. 395
  30. 460
  31. 320
  32. 4850
  33. 145
  34. 2350
  35. 220
  36. 1050
  37. 3150
  38. 65
  39. 4600
  40. 190

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