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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 648 · 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. 1.60 × 50 =
  2. 2.43 × 5 =
  3. 3.34 × 5 =
  4. 4.51 × 50 =
  5. 5.26 × 50 =
  6. 6.23 × 5 =
  7. 7.24 × 50 =
  8. 8.21 × 5 =
  9. 9.33 × 5 =
  10. 10.48 × 5 =
  11. 11.90 × 5 =
  12. 12.89 × 50 =
  13. 13.32 × 5 =
  14. 14.26 × 5 =
  15. 15.22 × 50 =
  16. 16.86 × 5 =
  17. 17.24 × 5 =
  18. 18.90 × 5 =
  19. 19.67 × 5 =
  20. 20.40 × 50 =
  21. 21.29 × 5 =
  22. 22.50 × 5 =
  23. 23.90 × 50 =
  24. 24.45 × 5 =
  25. 25.27 × 5 =
  26. 26.22 × 50 =
  27. 27.33 × 50 =
  28. 28.97 × 5 =
  29. 29.77 × 50 =
  30. 30.40 × 5 =
  31. 31.88 × 5 =
  32. 32.23 × 50 =
  33. 33.65 × 50 =
  34. 34.57 × 5 =
  35. 35.80 × 50 =
  36. 36.60 × 5 =
  37. 37.77 × 5 =
  38. 38.54 × 5 =
  39. 39.47 × 5 =
  40. 40.86 × 5 =

Answer key

  1. 3000
  2. 215
  3. 170
  4. 2550
  5. 1300
  6. 115
  7. 1200
  8. 105
  9. 165
  10. 240
  11. 450
  12. 4450
  13. 160
  14. 130
  15. 1100
  16. 430
  17. 120
  18. 450
  19. 335
  20. 2000
  21. 145
  22. 250
  23. 4500
  24. 225
  25. 135
  26. 1100
  27. 1650
  28. 485
  29. 3850
  30. 200
  31. 440
  32. 1150
  33. 3250
  34. 285
  35. 4000
  36. 300
  37. 385
  38. 270
  39. 235
  40. 430

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