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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 343 · 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. 1.86 × 5 =
  2. 2.74 × 5 =
  3. 3.42 × 5 =
  4. 4.13 × 50 =
  5. 5.43 × 50 =
  6. 6.25 × 50 =
  7. 7.47 × 50 =
  8. 8.74 × 50 =
  9. 9.12 × 5 =
  10. 10.58 × 50 =
  11. 11.96 × 5 =
  12. 12.38 × 50 =
  13. 13.18 × 5 =
  14. 14.88 × 5 =
  15. 15.64 × 5 =
  16. 16.26 × 50 =
  17. 17.14 × 5 =
  18. 18.74 × 50 =
  19. 19.75 × 50 =
  20. 20.34 × 5 =
  21. 21.90 × 5 =
  22. 22.31 × 50 =
  23. 23.41 × 5 =
  24. 24.79 × 5 =
  25. 25.89 × 50 =
  26. 26.13 × 5 =
  27. 27.78 × 50 =
  28. 28.54 × 5 =
  29. 29.77 × 5 =
  30. 30.44 × 50 =
  31. 31.13 × 50 =
  32. 32.92 × 5 =
  33. 33.49 × 50 =
  34. 34.19 × 50 =
  35. 35.63 × 50 =
  36. 36.16 × 50 =
  37. 37.35 × 5 =
  38. 38.91 × 50 =
  39. 39.82 × 5 =
  40. 40.64 × 50 =

Answer key

  1. 430
  2. 370
  3. 210
  4. 650
  5. 2150
  6. 1250
  7. 2350
  8. 3700
  9. 60
  10. 2900
  11. 480
  12. 1900
  13. 90
  14. 440
  15. 320
  16. 1300
  17. 70
  18. 3700
  19. 3750
  20. 170
  21. 450
  22. 1550
  23. 205
  24. 395
  25. 4450
  26. 65
  27. 3900
  28. 270
  29. 385
  30. 2200
  31. 650
  32. 460
  33. 2450
  34. 950
  35. 3150
  36. 800
  37. 175
  38. 4550
  39. 410
  40. 3200

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