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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 969 · 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. 1.79 × 50 =
  2. 2.21 × 50 =
  3. 3.52 × 5 =
  4. 4.98 × 5 =
  5. 5.50 × 5 =
  6. 6.97 × 5 =
  7. 7.78 × 5 =
  8. 8.91 × 50 =
  9. 9.65 × 5 =
  10. 10.48 × 50 =
  11. 11.26 × 5 =
  12. 12.32 × 5 =
  13. 13.35 × 50 =
  14. 14.50 × 5 =
  15. 15.15 × 50 =
  16. 16.94 × 5 =
  17. 17.62 × 5 =
  18. 18.98 × 5 =
  19. 19.75 × 50 =
  20. 20.30 × 50 =
  21. 21.32 × 5 =
  22. 22.52 × 5 =
  23. 23.68 × 5 =
  24. 24.84 × 5 =
  25. 25.48 × 5 =
  26. 26.55 × 50 =
  27. 27.63 × 5 =
  28. 28.58 × 50 =
  29. 29.76 × 50 =
  30. 30.12 × 5 =
  31. 31.96 × 5 =
  32. 32.34 × 5 =
  33. 33.65 × 5 =
  34. 34.29 × 5 =
  35. 35.83 × 50 =
  36. 36.90 × 50 =
  37. 37.69 × 5 =
  38. 38.51 × 50 =
  39. 39.75 × 5 =
  40. 40.16 × 50 =

Answer key

  1. 3950
  2. 1050
  3. 260
  4. 490
  5. 250
  6. 485
  7. 390
  8. 4550
  9. 325
  10. 2400
  11. 130
  12. 160
  13. 1750
  14. 250
  15. 750
  16. 470
  17. 310
  18. 490
  19. 3750
  20. 1500
  21. 160
  22. 260
  23. 340
  24. 420
  25. 240
  26. 2750
  27. 315
  28. 2900
  29. 3800
  30. 60
  31. 480
  32. 170
  33. 325
  34. 145
  35. 4150
  36. 4500
  37. 345
  38. 2550
  39. 375
  40. 800

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