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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 50 · 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. 1.16 × 50 =
  2. 2.26 × 50 =
  3. 3.43 × 50 =
  4. 4.12 × 50 =
  5. 5.40 × 5 =
  6. 6.76 × 5 =
  7. 7.88 × 5 =
  8. 8.48 × 50 =
  9. 9.72 × 50 =
  10. 10.46 × 5 =
  11. 11.34 × 50 =
  12. 12.66 × 5 =
  13. 13.82 × 5 =
  14. 14.30 × 50 =
  15. 15.74 × 50 =
  16. 16.63 × 5 =
  17. 17.52 × 5 =
  18. 18.57 × 50 =
  19. 19.82 × 5 =
  20. 20.49 × 5 =
  21. 21.58 × 5 =
  22. 22.27 × 50 =
  23. 23.53 × 50 =
  24. 24.28 × 50 =
  25. 25.24 × 50 =
  26. 26.18 × 50 =
  27. 27.25 × 5 =
  28. 28.35 × 5 =
  29. 29.32 × 50 =
  30. 30.82 × 50 =
  31. 31.15 × 50 =
  32. 32.43 × 50 =
  33. 33.65 × 50 =
  34. 34.21 × 50 =
  35. 35.49 × 5 =
  36. 36.55 × 5 =
  37. 37.89 × 5 =
  38. 38.92 × 50 =
  39. 39.98 × 5 =
  40. 40.50 × 5 =

Answer key

  1. 800
  2. 1300
  3. 2150
  4. 600
  5. 200
  6. 380
  7. 440
  8. 2400
  9. 3600
  10. 230
  11. 1700
  12. 330
  13. 410
  14. 1500
  15. 3700
  16. 315
  17. 260
  18. 2850
  19. 410
  20. 245
  21. 290
  22. 1350
  23. 2650
  24. 1400
  25. 1200
  26. 900
  27. 125
  28. 175
  29. 1600
  30. 4100
  31. 750
  32. 2150
  33. 3250
  34. 1050
  35. 245
  36. 275
  37. 445
  38. 4600
  39. 490
  40. 250

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