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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 730 · 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. 1.45 × 5 =
  2. 2.78 × 50 =
  3. 3.25 × 5 =
  4. 4.16 × 50 =
  5. 5.91 × 50 =
  6. 6.38 × 5 =
  7. 7.27 × 5 =
  8. 8.68 × 50 =
  9. 9.52 × 50 =
  10. 10.25 × 5 =
  11. 11.73 × 5 =
  12. 12.75 × 5 =
  13. 13.47 × 50 =
  14. 14.88 × 5 =
  15. 15.15 × 50 =
  16. 16.17 × 50 =
  17. 17.43 × 50 =
  18. 18.76 × 5 =
  19. 19.29 × 50 =
  20. 20.37 × 50 =
  21. 21.12 × 50 =
  22. 22.64 × 5 =
  23. 23.96 × 5 =
  24. 24.22 × 50 =
  25. 25.61 × 5 =
  26. 26.90 × 50 =
  27. 27.24 × 50 =
  28. 28.69 × 50 =
  29. 29.51 × 5 =
  30. 30.26 × 50 =
  31. 31.29 × 5 =
  32. 32.68 × 50 =
  33. 33.72 × 5 =
  34. 34.31 × 5 =
  35. 35.98 × 50 =
  36. 36.87 × 5 =
  37. 37.26 × 5 =
  38. 38.96 × 5 =
  39. 39.95 × 50 =
  40. 40.76 × 5 =

Answer key

  1. 225
  2. 3900
  3. 125
  4. 800
  5. 4550
  6. 190
  7. 135
  8. 3400
  9. 2600
  10. 125
  11. 365
  12. 375
  13. 2350
  14. 440
  15. 750
  16. 850
  17. 2150
  18. 380
  19. 1450
  20. 1850
  21. 600
  22. 320
  23. 480
  24. 1100
  25. 305
  26. 4500
  27. 1200
  28. 3450
  29. 255
  30. 1300
  31. 145
  32. 3400
  33. 360
  34. 155
  35. 4900
  36. 435
  37. 130
  38. 480
  39. 4750
  40. 380

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