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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 540 · 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. 1.56 × 5 =
  2. 2.65 × 50 =
  3. 3.52 × 5 =
  4. 4.24 × 5 =
  5. 5.51 × 50 =
  6. 6.61 × 5 =
  7. 7.78 × 5 =
  8. 8.34 × 5 =
  9. 9.70 × 50 =
  10. 10.19 × 5 =
  11. 11.23 × 50 =
  12. 12.24 × 50 =
  13. 13.80 × 5 =
  14. 14.42 × 5 =
  15. 15.68 × 5 =
  16. 16.95 × 50 =
  17. 17.15 × 50 =
  18. 18.25 × 50 =
  19. 19.91 × 5 =
  20. 20.98 × 5 =
  21. 21.98 × 50 =
  22. 22.86 × 50 =
  23. 23.50 × 50 =
  24. 24.54 × 50 =
  25. 25.95 × 5 =
  26. 26.79 × 5 =
  27. 27.32 × 50 =
  28. 28.27 × 50 =
  29. 29.67 × 50 =
  30. 30.88 × 5 =
  31. 31.37 × 5 =
  32. 32.14 × 50 =
  33. 33.29 × 50 =
  34. 34.75 × 5 =
  35. 35.83 × 5 =
  36. 36.21 × 5 =
  37. 37.87 × 5 =
  38. 38.46 × 50 =
  39. 39.51 × 50 =
  40. 40.80 × 5 =

Answer key

  1. 280
  2. 3250
  3. 260
  4. 120
  5. 2550
  6. 305
  7. 390
  8. 170
  9. 3500
  10. 95
  11. 1150
  12. 1200
  13. 400
  14. 210
  15. 340
  16. 4750
  17. 750
  18. 1250
  19. 455
  20. 490
  21. 4900
  22. 4300
  23. 2500
  24. 2700
  25. 475
  26. 395
  27. 1600
  28. 1350
  29. 3350
  30. 440
  31. 185
  32. 700
  33. 1450
  34. 375
  35. 415
  36. 105
  37. 435
  38. 2300
  39. 2550
  40. 400

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