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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 561 · 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. 1.90 × 50 =
  2. 2.42 × 50 =
  3. 3.60 × 5 =
  4. 4.95 × 50 =
  5. 5.13 × 50 =
  6. 6.45 × 50 =
  7. 7.51 × 50 =
  8. 8.21 × 5 =
  9. 9.87 × 5 =
  10. 10.92 × 50 =
  11. 11.64 × 50 =
  12. 12.92 × 5 =
  13. 13.41 × 5 =
  14. 14.93 × 5 =
  15. 15.64 × 50 =
  16. 16.37 × 5 =
  17. 17.37 × 50 =
  18. 18.55 × 50 =
  19. 19.61 × 50 =
  20. 20.26 × 5 =
  21. 21.87 × 50 =
  22. 22.21 × 5 =
  23. 23.62 × 50 =
  24. 24.65 × 50 =
  25. 25.26 × 5 =
  26. 26.13 × 50 =
  27. 27.81 × 50 =
  28. 28.70 × 5 =
  29. 29.17 × 50 =
  30. 30.92 × 50 =
  31. 31.51 × 50 =
  32. 32.44 × 50 =
  33. 33.62 × 5 =
  34. 34.50 × 50 =
  35. 35.55 × 50 =
  36. 36.50 × 50 =
  37. 37.58 × 5 =
  38. 38.12 × 50 =
  39. 39.34 × 5 =
  40. 40.26 × 5 =

Answer key

  1. 4500
  2. 2100
  3. 300
  4. 4750
  5. 650
  6. 2250
  7. 2550
  8. 105
  9. 435
  10. 4600
  11. 3200
  12. 460
  13. 205
  14. 465
  15. 3200
  16. 185
  17. 1850
  18. 2750
  19. 3050
  20. 130
  21. 4350
  22. 105
  23. 3100
  24. 3250
  25. 130
  26. 650
  27. 4050
  28. 350
  29. 850
  30. 4600
  31. 2550
  32. 2200
  33. 310
  34. 2500
  35. 2750
  36. 2500
  37. 290
  38. 600
  39. 170
  40. 130

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