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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 428 · 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. 1.58 × 50 =
  2. 2.44 × 5 =
  3. 3.66 × 5 =
  4. 4.80 × 5 =
  5. 5.23 × 50 =
  6. 6.98 × 50 =
  7. 7.52 × 5 =
  8. 8.22 × 5 =
  9. 9.36 × 5 =
  10. 10.28 × 5 =
  11. 11.19 × 5 =
  12. 12.38 × 5 =
  13. 13.37 × 5 =
  14. 14.69 × 50 =
  15. 15.17 × 50 =
  16. 16.74 × 50 =
  17. 17.42 × 50 =
  18. 18.17 × 5 =
  19. 19.96 × 50 =
  20. 20.41 × 5 =
  21. 21.69 × 5 =
  22. 22.98 × 5 =
  23. 23.85 × 5 =
  24. 24.23 × 50 =
  25. 25.41 × 50 =
  26. 26.84 × 5 =
  27. 27.85 × 5 =
  28. 28.92 × 5 =
  29. 29.28 × 50 =
  30. 30.79 × 5 =
  31. 31.81 × 50 =
  32. 32.57 × 5 =
  33. 33.97 × 5 =
  34. 34.51 × 50 =
  35. 35.63 × 50 =
  36. 36.61 × 50 =
  37. 37.53 × 50 =
  38. 38.18 × 5 =
  39. 39.19 × 50 =
  40. 40.85 × 50 =

Answer key

  1. 2900
  2. 220
  3. 330
  4. 400
  5. 1150
  6. 4900
  7. 260
  8. 110
  9. 180
  10. 140
  11. 95
  12. 190
  13. 185
  14. 3450
  15. 850
  16. 3700
  17. 2100
  18. 85
  19. 4800
  20. 205
  21. 345
  22. 490
  23. 425
  24. 1150
  25. 2050
  26. 420
  27. 425
  28. 460
  29. 1400
  30. 395
  31. 4050
  32. 285
  33. 485
  34. 2550
  35. 3150
  36. 3050
  37. 2650
  38. 90
  39. 950
  40. 4250

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