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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 55 · 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. 1.17 × 5 =
  2. 2.16 × 5 =
  3. 3.14 × 5 =
  4. 4.17 × 50 =
  5. 5.44 × 50 =
  6. 6.62 × 5 =
  7. 7.69 × 50 =
  8. 8.96 × 5 =
  9. 9.77 × 50 =
  10. 10.59 × 5 =
  11. 11.81 × 50 =
  12. 12.63 × 5 =
  13. 13.96 × 50 =
  14. 14.58 × 5 =
  15. 15.85 × 5 =
  16. 16.18 × 5 =
  17. 17.13 × 50 =
  18. 18.41 × 50 =
  19. 19.52 × 5 =
  20. 20.59 × 50 =
  21. 21.37 × 50 =
  22. 22.92 × 5 =
  23. 23.71 × 50 =
  24. 24.91 × 50 =
  25. 25.20 × 5 =
  26. 26.19 × 50 =
  27. 27.16 × 50 =
  28. 28.20 × 5 =
  29. 29.12 × 50 =
  30. 30.57 × 50 =
  31. 31.24 × 50 =
  32. 32.30 × 5 =
  33. 33.43 × 50 =
  34. 34.12 × 50 =
  35. 35.34 × 50 =
  36. 36.28 × 5 =
  37. 37.98 × 50 =
  38. 38.32 × 50 =
  39. 39.95 × 5 =
  40. 40.65 × 5 =

Answer key

  1. 85
  2. 80
  3. 70
  4. 850
  5. 2200
  6. 310
  7. 3450
  8. 480
  9. 3850
  10. 295
  11. 4050
  12. 315
  13. 4800
  14. 290
  15. 425
  16. 90
  17. 650
  18. 2050
  19. 260
  20. 2950
  21. 1850
  22. 460
  23. 3550
  24. 4550
  25. 100
  26. 950
  27. 800
  28. 100
  29. 600
  30. 2850
  31. 1200
  32. 150
  33. 2150
  34. 600
  35. 1700
  36. 140
  37. 4900
  38. 1600
  39. 475
  40. 325

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