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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 20 · 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. 1.14 × 50 =
  2. 2.72 × 50 =
  3. 3.45 × 50 =
  4. 4.96 × 50 =
  5. 5.40 × 5 =
  6. 6.28 × 50 =
  7. 7.14 × 5 =
  8. 8.55 × 50 =
  9. 9.48 × 50 =
  10. 10.89 × 5 =
  11. 11.72 × 5 =
  12. 12.24 × 50 =
  13. 13.14 × 5 =
  14. 14.28 × 50 =
  15. 15.78 × 5 =
  16. 16.43 × 50 =
  17. 17.53 × 5 =
  18. 18.52 × 5 =
  19. 19.53 × 50 =
  20. 20.44 × 50 =
  21. 21.85 × 5 =
  22. 22.14 × 50 =
  23. 23.14 × 5 =
  24. 24.69 × 50 =
  25. 25.74 × 5 =
  26. 26.23 × 50 =
  27. 27.48 × 5 =
  28. 28.86 × 5 =
  29. 29.74 × 50 =
  30. 30.63 × 50 =
  31. 31.68 × 50 =
  32. 32.60 × 5 =
  33. 33.67 × 5 =
  34. 34.12 × 5 =
  35. 35.50 × 50 =
  36. 36.51 × 50 =
  37. 37.31 × 50 =
  38. 38.13 × 5 =
  39. 39.27 × 5 =
  40. 40.30 × 5 =

Answer key

  1. 700
  2. 3600
  3. 2250
  4. 4800
  5. 200
  6. 1400
  7. 70
  8. 2750
  9. 2400
  10. 445
  11. 360
  12. 1200
  13. 70
  14. 1400
  15. 390
  16. 2150
  17. 265
  18. 260
  19. 2650
  20. 2200
  21. 425
  22. 700
  23. 70
  24. 3450
  25. 370
  26. 1150
  27. 240
  28. 430
  29. 3700
  30. 3150
  31. 3400
  32. 300
  33. 335
  34. 60
  35. 2500
  36. 2550
  37. 1550
  38. 65
  39. 135
  40. 150

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