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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 597 · 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. 1.88 × 5 =
  2. 2.51 × 50 =
  3. 3.74 × 5 =
  4. 4.30 × 5 =
  5. 5.30 × 50 =
  6. 6.24 × 5 =
  7. 7.80 × 5 =
  8. 8.32 × 5 =
  9. 9.55 × 5 =
  10. 10.48 × 5 =
  11. 11.58 × 50 =
  12. 12.88 × 50 =
  13. 13.44 × 5 =
  14. 14.48 × 5 =
  15. 15.26 × 50 =
  16. 16.78 × 5 =
  17. 17.42 × 50 =
  18. 18.14 × 5 =
  19. 19.98 × 5 =
  20. 20.41 × 5 =
  21. 21.60 × 5 =
  22. 22.98 × 5 =
  23. 23.44 × 50 =
  24. 24.28 × 5 =
  25. 25.16 × 50 =
  26. 26.54 × 5 =
  27. 27.81 × 50 =
  28. 28.83 × 5 =
  29. 29.40 × 5 =
  30. 30.58 × 5 =
  31. 31.58 × 50 =
  32. 32.39 × 5 =
  33. 33.71 × 50 =
  34. 34.77 × 5 =
  35. 35.63 × 50 =
  36. 36.56 × 5 =
  37. 37.53 × 5 =
  38. 38.43 × 5 =
  39. 39.42 × 50 =
  40. 40.28 × 50 =

Answer key

  1. 440
  2. 2550
  3. 370
  4. 150
  5. 1500
  6. 120
  7. 400
  8. 160
  9. 275
  10. 240
  11. 2900
  12. 4400
  13. 220
  14. 240
  15. 1300
  16. 390
  17. 2100
  18. 70
  19. 490
  20. 205
  21. 300
  22. 490
  23. 2200
  24. 140
  25. 800
  26. 270
  27. 4050
  28. 415
  29. 200
  30. 290
  31. 2900
  32. 195
  33. 3550
  34. 385
  35. 3150
  36. 280
  37. 265
  38. 215
  39. 2100
  40. 1400

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