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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 724 · 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. 2.55 × 5 =
  3. 3.37 × 50 =
  4. 4.74 × 50 =
  5. 5.61 × 50 =
  6. 6.43 × 50 =
  7. 7.78 × 50 =
  8. 8.42 × 50 =
  9. 9.90 × 5 =
  10. 10.87 × 50 =
  11. 11.97 × 50 =
  12. 12.91 × 5 =
  13. 13.75 × 50 =
  14. 14.42 × 5 =
  15. 15.40 × 50 =
  16. 16.18 × 5 =
  17. 17.37 × 5 =
  18. 18.27 × 5 =
  19. 19.44 × 50 =
  20. 20.45 × 5 =
  21. 21.37 × 5 =
  22. 22.92 × 50 =
  23. 23.46 × 5 =
  24. 24.88 × 5 =
  25. 25.28 × 50 =
  26. 26.57 × 50 =
  27. 27.55 × 5 =
  28. 28.63 × 50 =
  29. 29.51 × 5 =
  30. 30.61 × 5 =
  31. 31.76 × 5 =
  32. 32.41 × 5 =
  33. 33.45 × 50 =
  34. 34.52 × 50 =
  35. 35.63 × 5 =
  36. 36.21 × 50 =
  37. 37.29 × 50 =
  38. 38.55 × 50 =
  39. 39.95 × 5 =
  40. 40.53 × 5 =

Answer key

  1. 225
  2. 275
  3. 1850
  4. 3700
  5. 3050
  6. 2150
  7. 3900
  8. 2100
  9. 450
  10. 4350
  11. 4850
  12. 455
  13. 3750
  14. 210
  15. 2000
  16. 90
  17. 185
  18. 135
  19. 2200
  20. 225
  21. 185
  22. 4600
  23. 230
  24. 440
  25. 1400
  26. 2850
  27. 275
  28. 3150
  29. 255
  30. 305
  31. 380
  32. 205
  33. 2250
  34. 2600
  35. 315
  36. 1050
  37. 1450
  38. 2750
  39. 475
  40. 265

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