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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 253 · 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. 1.77 × 5 =
  2. 2.89 × 5 =
  3. 3.18 × 5 =
  4. 4.50 × 5 =
  5. 5.48 × 50 =
  6. 6.68 × 5 =
  7. 7.20 × 5 =
  8. 8.26 × 5 =
  9. 9.53 × 50 =
  10. 10.50 × 5 =
  11. 11.64 × 50 =
  12. 12.66 × 5 =
  13. 13.72 × 50 =
  14. 14.54 × 50 =
  15. 15.73 × 50 =
  16. 16.28 × 5 =
  17. 17.21 × 50 =
  18. 18.92 × 50 =
  19. 19.16 × 50 =
  20. 20.19 × 50 =
  21. 21.59 × 5 =
  22. 22.71 × 50 =
  23. 23.69 × 50 =
  24. 24.20 × 50 =
  25. 25.28 × 5 =
  26. 26.94 × 50 =
  27. 27.80 × 5 =
  28. 28.49 × 5 =
  29. 29.16 × 50 =
  30. 30.20 × 50 =
  31. 31.61 × 50 =
  32. 32.18 × 50 =
  33. 33.75 × 50 =
  34. 34.62 × 50 =
  35. 35.36 × 5 =
  36. 36.29 × 50 =
  37. 37.68 × 50 =
  38. 38.47 × 5 =
  39. 39.75 × 5 =
  40. 40.67 × 50 =

Answer key

  1. 385
  2. 445
  3. 90
  4. 250
  5. 2400
  6. 340
  7. 100
  8. 130
  9. 2650
  10. 250
  11. 3200
  12. 330
  13. 3600
  14. 2700
  15. 3650
  16. 140
  17. 1050
  18. 4600
  19. 800
  20. 950
  21. 295
  22. 3550
  23. 3450
  24. 1000
  25. 140
  26. 4700
  27. 400
  28. 245
  29. 800
  30. 1000
  31. 3050
  32. 900
  33. 3750
  34. 3100
  35. 180
  36. 1450
  37. 3400
  38. 235
  39. 375
  40. 3350

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