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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 114 · 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. 1.23 × 5 =
  2. 2.77 × 50 =
  3. 3.64 × 5 =
  4. 4.97 × 5 =
  5. 5.63 × 50 =
  6. 6.69 × 5 =
  7. 7.65 × 50 =
  8. 8.82 × 50 =
  9. 9.21 × 5 =
  10. 10.20 × 5 =
  11. 11.28 × 5 =
  12. 12.78 × 5 =
  13. 13.13 × 5 =
  14. 14.15 × 50 =
  15. 15.88 × 5 =
  16. 16.84 × 5 =
  17. 17.63 × 5 =
  18. 18.57 × 50 =
  19. 19.28 × 50 =
  20. 20.47 × 50 =
  21. 21.23 × 5 =
  22. 22.18 × 50 =
  23. 23.87 × 5 =
  24. 24.41 × 50 =
  25. 25.55 × 50 =
  26. 26.55 × 5 =
  27. 27.58 × 50 =
  28. 28.24 × 5 =
  29. 29.21 × 5 =
  30. 30.92 × 50 =
  31. 31.88 × 5 =
  32. 32.60 × 50 =
  33. 33.42 × 5 =
  34. 34.93 × 5 =
  35. 35.28 × 50 =
  36. 36.79 × 50 =
  37. 37.75 × 50 =
  38. 38.31 × 5 =
  39. 39.37 × 50 =
  40. 40.60 × 5 =

Answer key

  1. 115
  2. 3850
  3. 320
  4. 485
  5. 3150
  6. 345
  7. 3250
  8. 4100
  9. 105
  10. 100
  11. 140
  12. 390
  13. 65
  14. 750
  15. 440
  16. 420
  17. 315
  18. 2850
  19. 1400
  20. 2350
  21. 115
  22. 900
  23. 435
  24. 2050
  25. 2750
  26. 275
  27. 2900
  28. 120
  29. 105
  30. 4600
  31. 440
  32. 3000
  33. 210
  34. 465
  35. 1400
  36. 3950
  37. 3750
  38. 155
  39. 1850
  40. 300

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