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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 303 · 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. 1.29 × 5 =
  2. 2.33 × 5 =
  3. 3.42 × 50 =
  4. 4.15 × 50 =
  5. 5.75 × 50 =
  6. 6.52 × 5 =
  7. 7.94 × 50 =
  8. 8.83 × 50 =
  9. 9.34 × 50 =
  10. 10.38 × 5 =
  11. 11.86 × 5 =
  12. 12.37 × 50 =
  13. 13.90 × 50 =
  14. 14.55 × 5 =
  15. 15.65 × 5 =
  16. 16.96 × 5 =
  17. 17.44 × 50 =
  18. 18.21 × 5 =
  19. 19.95 × 50 =
  20. 20.64 × 50 =
  21. 21.75 × 50 =
  22. 22.44 × 5 =
  23. 23.20 × 5 =
  24. 24.72 × 50 =
  25. 25.54 × 5 =
  26. 26.69 × 50 =
  27. 27.68 × 5 =
  28. 28.81 × 50 =
  29. 29.13 × 50 =
  30. 30.88 × 5 =
  31. 31.68 × 50 =
  32. 32.38 × 5 =
  33. 33.21 × 50 =
  34. 34.88 × 5 =
  35. 35.23 × 50 =
  36. 36.69 × 50 =
  37. 37.56 × 50 =
  38. 38.90 × 5 =
  39. 39.42 × 5 =
  40. 40.13 × 50 =

Answer key

  1. 145
  2. 165
  3. 2100
  4. 750
  5. 3750
  6. 260
  7. 4700
  8. 4150
  9. 1700
  10. 190
  11. 430
  12. 1850
  13. 4500
  14. 275
  15. 325
  16. 480
  17. 2200
  18. 105
  19. 4750
  20. 3200
  21. 3750
  22. 220
  23. 100
  24. 3600
  25. 270
  26. 3450
  27. 340
  28. 4050
  29. 650
  30. 440
  31. 3400
  32. 190
  33. 1050
  34. 440
  35. 1150
  36. 3450
  37. 2800
  38. 450
  39. 210
  40. 650

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