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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 782 · 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. 1.58 × 50 =
  2. 2.69 × 50 =
  3. 3.70 × 5 =
  4. 4.34 × 50 =
  5. 5.27 × 5 =
  6. 6.53 × 5 =
  7. 7.30 × 5 =
  8. 8.27 × 50 =
  9. 9.46 × 50 =
  10. 10.79 × 50 =
  11. 11.70 × 50 =
  12. 12.26 × 5 =
  13. 13.88 × 5 =
  14. 14.47 × 5 =
  15. 15.18 × 5 =
  16. 16.98 × 50 =
  17. 17.61 × 50 =
  18. 18.54 × 50 =
  19. 19.86 × 50 =
  20. 20.67 × 5 =
  21. 21.91 × 50 =
  22. 22.65 × 5 =
  23. 23.34 × 50 =
  24. 24.95 × 5 =
  25. 25.32 × 50 =
  26. 26.17 × 5 =
  27. 27.51 × 5 =
  28. 28.37 × 5 =
  29. 29.80 × 50 =
  30. 30.38 × 50 =
  31. 31.33 × 5 =
  32. 32.67 × 5 =
  33. 33.76 × 5 =
  34. 34.92 × 5 =
  35. 35.17 × 5 =
  36. 36.38 × 5 =
  37. 37.77 × 50 =
  38. 38.31 × 50 =
  39. 39.87 × 5 =
  40. 40.61 × 5 =

Answer key

  1. 2900
  2. 3450
  3. 350
  4. 1700
  5. 135
  6. 265
  7. 150
  8. 1350
  9. 2300
  10. 3950
  11. 3500
  12. 130
  13. 440
  14. 235
  15. 90
  16. 4900
  17. 3050
  18. 2700
  19. 4300
  20. 335
  21. 4550
  22. 325
  23. 1700
  24. 475
  25. 1600
  26. 85
  27. 255
  28. 185
  29. 4000
  30. 1900
  31. 165
  32. 335
  33. 380
  34. 460
  35. 85
  36. 190
  37. 3850
  38. 1550
  39. 435
  40. 305

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