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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 226 · 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. 1.74 × 5 =
  2. 2.72 × 5 =
  3. 3.35 × 50 =
  4. 4.80 × 5 =
  5. 5.21 × 50 =
  6. 6.16 × 5 =
  7. 7.51 × 50 =
  8. 8.79 × 50 =
  9. 9.13 × 50 =
  10. 10.31 × 50 =
  11. 11.88 × 5 =
  12. 12.89 × 50 =
  13. 13.48 × 5 =
  14. 14.95 × 5 =
  15. 15.54 × 5 =
  16. 16.18 × 5 =
  17. 17.55 × 50 =
  18. 18.45 × 5 =
  19. 19.80 × 5 =
  20. 20.89 × 5 =
  21. 21.44 × 5 =
  22. 22.76 × 5 =
  23. 23.81 × 5 =
  24. 24.21 × 50 =
  25. 25.52 × 5 =
  26. 26.98 × 50 =
  27. 27.61 × 50 =
  28. 28.48 × 50 =
  29. 29.30 × 5 =
  30. 30.42 × 5 =
  31. 31.87 × 50 =
  32. 32.22 × 5 =
  33. 33.57 × 50 =
  34. 34.78 × 5 =
  35. 35.39 × 5 =
  36. 36.94 × 5 =
  37. 37.93 × 5 =
  38. 38.26 × 50 =
  39. 39.92 × 50 =
  40. 40.80 × 50 =

Answer key

  1. 370
  2. 360
  3. 1750
  4. 400
  5. 1050
  6. 80
  7. 2550
  8. 3950
  9. 650
  10. 1550
  11. 440
  12. 4450
  13. 240
  14. 475
  15. 270
  16. 90
  17. 2750
  18. 225
  19. 400
  20. 445
  21. 220
  22. 380
  23. 405
  24. 1050
  25. 260
  26. 4900
  27. 3050
  28. 2400
  29. 150
  30. 210
  31. 4350
  32. 110
  33. 2850
  34. 390
  35. 195
  36. 470
  37. 465
  38. 1300
  39. 4600
  40. 4000

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