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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 86 · 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. 1.84 × 5 =
  2. 2.36 × 5 =
  3. 3.47 × 50 =
  4. 4.76 × 50 =
  5. 5.37 × 50 =
  6. 6.28 × 50 =
  7. 7.35 × 5 =
  8. 8.53 × 50 =
  9. 9.34 × 5 =
  10. 10.12 × 50 =
  11. 11.51 × 50 =
  12. 12.31 × 50 =
  13. 13.95 × 5 =
  14. 14.41 × 50 =
  15. 15.49 × 5 =
  16. 16.56 × 5 =
  17. 17.68 × 50 =
  18. 18.32 × 5 =
  19. 19.33 × 5 =
  20. 20.27 × 50 =
  21. 21.13 × 50 =
  22. 22.12 × 50 =
  23. 23.76 × 5 =
  24. 24.15 × 50 =
  25. 25.71 × 50 =
  26. 26.47 × 5 =
  27. 27.42 × 50 =
  28. 28.73 × 50 =
  29. 29.25 × 50 =
  30. 30.29 × 50 =
  31. 31.12 × 50 =
  32. 32.17 × 50 =
  33. 33.98 × 50 =
  34. 34.86 × 5 =
  35. 35.54 × 5 =
  36. 36.58 × 5 =
  37. 37.91 × 5 =
  38. 38.21 × 5 =
  39. 39.31 × 50 =
  40. 40.18 × 50 =

Answer key

  1. 420
  2. 180
  3. 2350
  4. 3800
  5. 1850
  6. 1400
  7. 175
  8. 2650
  9. 170
  10. 600
  11. 2550
  12. 1550
  13. 475
  14. 2050
  15. 245
  16. 280
  17. 3400
  18. 160
  19. 165
  20. 1350
  21. 650
  22. 600
  23. 380
  24. 750
  25. 3550
  26. 235
  27. 2100
  28. 3650
  29. 1250
  30. 1450
  31. 600
  32. 850
  33. 4900
  34. 430
  35. 270
  36. 290
  37. 455
  38. 105
  39. 1550
  40. 900

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