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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 703 · 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. 1.81 × 50 =
  2. 2.33 × 50 =
  3. 3.14 × 50 =
  4. 4.19 × 50 =
  5. 5.49 × 5 =
  6. 6.89 × 5 =
  7. 7.92 × 50 =
  8. 8.28 × 5 =
  9. 9.98 × 50 =
  10. 10.51 × 50 =
  11. 11.21 × 50 =
  12. 12.67 × 5 =
  13. 13.23 × 50 =
  14. 14.61 × 50 =
  15. 15.14 × 50 =
  16. 16.81 × 50 =
  17. 17.62 × 50 =
  18. 18.12 × 5 =
  19. 19.75 × 50 =
  20. 20.59 × 5 =
  21. 21.73 × 5 =
  22. 22.47 × 50 =
  23. 23.36 × 5 =
  24. 24.56 × 50 =
  25. 25.27 × 50 =
  26. 26.73 × 50 =
  27. 27.70 × 50 =
  28. 28.94 × 50 =
  29. 29.29 × 5 =
  30. 30.77 × 50 =
  31. 31.48 × 5 =
  32. 32.80 × 50 =
  33. 33.62 × 5 =
  34. 34.29 × 5 =
  35. 35.86 × 50 =
  36. 36.40 × 50 =
  37. 37.77 × 5 =
  38. 38.89 × 5 =
  39. 39.98 × 50 =
  40. 40.41 × 5 =

Answer key

  1. 4050
  2. 1650
  3. 700
  4. 950
  5. 245
  6. 445
  7. 4600
  8. 140
  9. 4900
  10. 2550
  11. 1050
  12. 335
  13. 1150
  14. 3050
  15. 700
  16. 4050
  17. 3100
  18. 60
  19. 3750
  20. 295
  21. 365
  22. 2350
  23. 180
  24. 2800
  25. 1350
  26. 3650
  27. 3500
  28. 4700
  29. 145
  30. 3850
  31. 240
  32. 4000
  33. 310
  34. 145
  35. 4300
  36. 2000
  37. 385
  38. 445
  39. 4900
  40. 205

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