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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 709 · 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. 1.20 × 5 =
  2. 2.36 × 50 =
  3. 3.51 × 5 =
  4. 4.33 × 50 =
  5. 5.16 × 5 =
  6. 6.20 × 5 =
  7. 7.62 × 5 =
  8. 8.76 × 5 =
  9. 9.12 × 5 =
  10. 10.28 × 5 =
  11. 11.17 × 5 =
  12. 12.64 × 5 =
  13. 13.57 × 5 =
  14. 14.91 × 5 =
  15. 15.26 × 50 =
  16. 16.80 × 5 =
  17. 17.28 × 50 =
  18. 18.86 × 5 =
  19. 19.64 × 5 =
  20. 20.40 × 5 =
  21. 21.80 × 50 =
  22. 22.22 × 5 =
  23. 23.61 × 5 =
  24. 24.54 × 50 =
  25. 25.56 × 50 =
  26. 26.66 × 5 =
  27. 27.92 × 5 =
  28. 28.27 × 5 =
  29. 29.22 × 5 =
  30. 30.78 × 50 =
  31. 31.77 × 5 =
  32. 32.59 × 50 =
  33. 33.72 × 50 =
  34. 34.52 × 5 =
  35. 35.61 × 5 =
  36. 36.91 × 5 =
  37. 37.47 × 50 =
  38. 38.75 × 50 =
  39. 39.25 × 5 =
  40. 40.96 × 5 =

Answer key

  1. 100
  2. 1800
  3. 255
  4. 1650
  5. 80
  6. 100
  7. 310
  8. 380
  9. 60
  10. 140
  11. 85
  12. 320
  13. 285
  14. 455
  15. 1300
  16. 400
  17. 1400
  18. 430
  19. 320
  20. 200
  21. 4000
  22. 110
  23. 305
  24. 2700
  25. 2800
  26. 330
  27. 460
  28. 135
  29. 110
  30. 3900
  31. 385
  32. 2950
  33. 3600
  34. 260
  35. 305
  36. 455
  37. 2350
  38. 3750
  39. 125
  40. 480

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