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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 380 · 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. 1.75 × 50 =
  2. 2.77 × 50 =
  3. 3.60 × 5 =
  4. 4.91 × 5 =
  5. 5.90 × 50 =
  6. 6.92 × 50 =
  7. 7.51 × 5 =
  8. 8.85 × 50 =
  9. 9.92 × 5 =
  10. 10.44 × 50 =
  11. 11.31 × 5 =
  12. 12.95 × 50 =
  13. 13.31 × 5 =
  14. 14.60 × 5 =
  15. 15.63 × 5 =
  16. 16.13 × 5 =
  17. 17.51 × 50 =
  18. 18.98 × 5 =
  19. 19.44 × 50 =
  20. 20.74 × 5 =
  21. 21.85 × 5 =
  22. 22.29 × 50 =
  23. 23.51 × 5 =
  24. 24.45 × 5 =
  25. 25.86 × 50 =
  26. 26.13 × 5 =
  27. 27.26 × 50 =
  28. 28.14 × 50 =
  29. 29.77 × 50 =
  30. 30.28 × 50 =
  31. 31.56 × 50 =
  32. 32.68 × 50 =
  33. 33.91 × 50 =
  34. 34.66 × 50 =
  35. 35.76 × 5 =
  36. 36.31 × 50 =
  37. 37.59 × 5 =
  38. 38.59 × 5 =
  39. 39.92 × 50 =
  40. 40.93 × 50 =

Answer key

  1. 3750
  2. 3850
  3. 300
  4. 455
  5. 4500
  6. 4600
  7. 255
  8. 4250
  9. 460
  10. 2200
  11. 155
  12. 4750
  13. 155
  14. 300
  15. 315
  16. 65
  17. 2550
  18. 490
  19. 2200
  20. 370
  21. 425
  22. 1450
  23. 255
  24. 225
  25. 4300
  26. 65
  27. 1300
  28. 700
  29. 3850
  30. 1400
  31. 2800
  32. 3400
  33. 4550
  34. 3300
  35. 380
  36. 1550
  37. 295
  38. 295
  39. 4600
  40. 4650

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