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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 247 · 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. 1.78 × 5 =
  2. 2.56 × 5 =
  3. 3.38 × 5 =
  4. 4.19 × 50 =
  5. 5.53 × 5 =
  6. 6.47 × 50 =
  7. 7.21 × 5 =
  8. 8.78 × 5 =
  9. 9.32 × 5 =
  10. 10.32 × 5 =
  11. 11.58 × 50 =
  12. 12.72 × 50 =
  13. 13.78 × 5 =
  14. 14.46 × 5 =
  15. 15.65 × 5 =
  16. 16.80 × 50 =
  17. 17.29 × 50 =
  18. 18.44 × 50 =
  19. 19.67 × 50 =
  20. 20.12 × 50 =
  21. 21.51 × 50 =
  22. 22.42 × 50 =
  23. 23.71 × 50 =
  24. 24.58 × 50 =
  25. 25.92 × 5 =
  26. 26.30 × 50 =
  27. 27.39 × 5 =
  28. 28.32 × 5 =
  29. 29.84 × 50 =
  30. 30.92 × 50 =
  31. 31.36 × 5 =
  32. 32.80 × 5 =
  33. 33.66 × 50 =
  34. 34.48 × 5 =
  35. 35.21 × 50 =
  36. 36.22 × 50 =
  37. 37.28 × 5 =
  38. 38.25 × 5 =
  39. 39.72 × 5 =
  40. 40.63 × 5 =

Answer key

  1. 390
  2. 280
  3. 190
  4. 950
  5. 265
  6. 2350
  7. 105
  8. 390
  9. 160
  10. 160
  11. 2900
  12. 3600
  13. 390
  14. 230
  15. 325
  16. 4000
  17. 1450
  18. 2200
  19. 3350
  20. 600
  21. 2550
  22. 2100
  23. 3550
  24. 2900
  25. 460
  26. 1500
  27. 195
  28. 160
  29. 4200
  30. 4600
  31. 180
  32. 400
  33. 3300
  34. 240
  35. 1050
  36. 1100
  37. 140
  38. 125
  39. 360
  40. 315

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