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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 289 · 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. 1.40 × 5 =
  2. 2.15 × 5 =
  3. 3.15 × 5 =
  4. 4.69 × 50 =
  5. 5.18 × 50 =
  6. 6.64 × 5 =
  7. 7.16 × 50 =
  8. 8.58 × 5 =
  9. 9.64 × 50 =
  10. 10.53 × 50 =
  11. 11.17 × 5 =
  12. 12.54 × 5 =
  13. 13.55 × 5 =
  14. 14.92 × 50 =
  15. 15.45 × 5 =
  16. 16.91 × 5 =
  17. 17.31 × 5 =
  18. 18.21 × 5 =
  19. 19.72 × 5 =
  20. 20.19 × 50 =
  21. 21.85 × 5 =
  22. 22.72 × 5 =
  23. 23.93 × 5 =
  24. 24.50 × 5 =
  25. 25.60 × 5 =
  26. 26.21 × 50 =
  27. 27.44 × 50 =
  28. 28.98 × 50 =
  29. 29.77 × 50 =
  30. 30.12 × 50 =
  31. 31.62 × 5 =
  32. 32.65 × 50 =
  33. 33.86 × 50 =
  34. 34.25 × 50 =
  35. 35.20 × 5 =
  36. 36.43 × 5 =
  37. 37.35 × 5 =
  38. 38.52 × 5 =
  39. 39.57 × 5 =
  40. 40.31 × 50 =

Answer key

  1. 200
  2. 75
  3. 75
  4. 3450
  5. 900
  6. 320
  7. 800
  8. 290
  9. 3200
  10. 2650
  11. 85
  12. 270
  13. 275
  14. 4600
  15. 225
  16. 455
  17. 155
  18. 105
  19. 360
  20. 950
  21. 425
  22. 360
  23. 465
  24. 250
  25. 300
  26. 1050
  27. 2200
  28. 4900
  29. 3850
  30. 600
  31. 310
  32. 3250
  33. 4300
  34. 1250
  35. 100
  36. 215
  37. 175
  38. 260
  39. 285
  40. 1550

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