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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 405 · 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 × 50 =
  2. 2.65 × 50 =
  3. 3.74 × 50 =
  4. 4.85 × 5 =
  5. 5.29 × 5 =
  6. 6.95 × 50 =
  7. 7.92 × 5 =
  8. 8.93 × 5 =
  9. 9.46 × 5 =
  10. 10.16 × 5 =
  11. 11.72 × 5 =
  12. 12.18 × 50 =
  13. 13.71 × 50 =
  14. 14.56 × 5 =
  15. 15.19 × 50 =
  16. 16.92 × 50 =
  17. 17.29 × 50 =
  18. 18.98 × 50 =
  19. 19.61 × 50 =
  20. 20.20 × 50 =
  21. 21.60 × 5 =
  22. 22.80 × 5 =
  23. 23.63 × 50 =
  24. 24.28 × 5 =
  25. 25.23 × 50 =
  26. 26.17 × 5 =
  27. 27.89 × 50 =
  28. 28.56 × 50 =
  29. 29.17 × 5 =
  30. 30.44 × 5 =
  31. 31.74 × 5 =
  32. 32.15 × 50 =
  33. 33.14 × 50 =
  34. 34.58 × 50 =
  35. 35.65 × 5 =
  36. 36.45 × 50 =
  37. 37.65 × 50 =
  38. 38.89 × 5 =
  39. 39.32 × 5 =
  40. 40.39 × 50 =

Answer key

  1. 3850
  2. 3250
  3. 3700
  4. 425
  5. 145
  6. 4750
  7. 460
  8. 465
  9. 230
  10. 80
  11. 360
  12. 900
  13. 3550
  14. 280
  15. 950
  16. 4600
  17. 1450
  18. 4900
  19. 3050
  20. 1000
  21. 300
  22. 400
  23. 3150
  24. 140
  25. 1150
  26. 85
  27. 4450
  28. 2800
  29. 85
  30. 220
  31. 370
  32. 750
  33. 700
  34. 2900
  35. 325
  36. 2250
  37. 3250
  38. 445
  39. 160
  40. 1950

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