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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 643 · 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. 1.44 × 5 =
  2. 2.33 × 50 =
  3. 3.80 × 5 =
  4. 4.62 × 50 =
  5. 5.90 × 5 =
  6. 6.86 × 5 =
  7. 7.60 × 5 =
  8. 8.35 × 5 =
  9. 9.53 × 5 =
  10. 10.26 × 5 =
  11. 11.57 × 50 =
  12. 12.47 × 5 =
  13. 13.41 × 50 =
  14. 14.61 × 50 =
  15. 15.63 × 5 =
  16. 16.22 × 50 =
  17. 17.32 × 50 =
  18. 18.47 × 5 =
  19. 19.50 × 5 =
  20. 20.32 × 5 =
  21. 21.54 × 5 =
  22. 22.74 × 50 =
  23. 23.95 × 50 =
  24. 24.80 × 5 =
  25. 25.90 × 50 =
  26. 26.82 × 5 =
  27. 27.59 × 50 =
  28. 28.21 × 5 =
  29. 29.76 × 50 =
  30. 30.92 × 5 =
  31. 31.12 × 5 =
  32. 32.12 × 50 =
  33. 33.32 × 50 =
  34. 34.25 × 50 =
  35. 35.52 × 5 =
  36. 36.48 × 50 =
  37. 37.74 × 5 =
  38. 38.45 × 50 =
  39. 39.53 × 5 =
  40. 40.47 × 50 =

Answer key

  1. 220
  2. 1650
  3. 400
  4. 3100
  5. 450
  6. 430
  7. 300
  8. 175
  9. 265
  10. 130
  11. 2850
  12. 235
  13. 2050
  14. 3050
  15. 315
  16. 1100
  17. 1600
  18. 235
  19. 250
  20. 160
  21. 270
  22. 3700
  23. 4750
  24. 400
  25. 4500
  26. 410
  27. 2950
  28. 105
  29. 3800
  30. 460
  31. 60
  32. 600
  33. 1600
  34. 1250
  35. 260
  36. 2400
  37. 370
  38. 2250
  39. 265
  40. 2350

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