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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 101 · 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. 1.96 × 5 =
  2. 2.69 × 5 =
  3. 3.87 × 50 =
  4. 4.52 × 50 =
  5. 5.71 × 50 =
  6. 6.35 × 5 =
  7. 7.15 × 5 =
  8. 8.16 × 5 =
  9. 9.24 × 5 =
  10. 10.63 × 5 =
  11. 11.69 × 50 =
  12. 12.91 × 5 =
  13. 13.32 × 5 =
  14. 14.62 × 50 =
  15. 15.96 × 50 =
  16. 16.37 × 5 =
  17. 17.20 × 50 =
  18. 18.20 × 5 =
  19. 19.24 × 5 =
  20. 20.68 × 50 =
  21. 21.64 × 50 =
  22. 22.58 × 5 =
  23. 23.17 × 50 =
  24. 24.35 × 50 =
  25. 25.95 × 50 =
  26. 26.98 × 50 =
  27. 27.70 × 50 =
  28. 28.80 × 5 =
  29. 29.40 × 50 =
  30. 30.57 × 50 =
  31. 31.35 × 5 =
  32. 32.31 × 5 =
  33. 33.64 × 50 =
  34. 34.93 × 5 =
  35. 35.24 × 50 =
  36. 36.28 × 50 =
  37. 37.62 × 5 =
  38. 38.44 × 50 =
  39. 39.92 × 5 =
  40. 40.26 × 50 =

Answer key

  1. 480
  2. 345
  3. 4350
  4. 2600
  5. 3550
  6. 175
  7. 75
  8. 80
  9. 120
  10. 315
  11. 3450
  12. 455
  13. 160
  14. 3100
  15. 4800
  16. 185
  17. 1000
  18. 100
  19. 120
  20. 3400
  21. 3200
  22. 290
  23. 850
  24. 1750
  25. 4750
  26. 4900
  27. 3500
  28. 400
  29. 2000
  30. 2850
  31. 175
  32. 155
  33. 3200
  34. 465
  35. 1200
  36. 1400
  37. 310
  38. 2200
  39. 460
  40. 1300

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