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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 984 · 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. 1.89 × 5 =
  2. 2.13 × 5 =
  3. 3.25 × 5 =
  4. 4.53 × 5 =
  5. 5.12 × 50 =
  6. 6.66 × 5 =
  7. 7.33 × 50 =
  8. 8.43 × 5 =
  9. 9.24 × 5 =
  10. 10.63 × 5 =
  11. 11.33 × 50 =
  12. 12.69 × 50 =
  13. 13.13 × 5 =
  14. 14.82 × 5 =
  15. 15.69 × 50 =
  16. 16.73 × 5 =
  17. 17.35 × 5 =
  18. 18.32 × 5 =
  19. 19.67 × 50 =
  20. 20.68 × 50 =
  21. 21.61 × 50 =
  22. 22.84 × 5 =
  23. 23.84 × 50 =
  24. 24.65 × 50 =
  25. 25.50 × 50 =
  26. 26.65 × 5 =
  27. 27.35 × 5 =
  28. 28.96 × 50 =
  29. 29.34 × 5 =
  30. 30.88 × 5 =
  31. 31.75 × 5 =
  32. 32.18 × 5 =
  33. 33.28 × 50 =
  34. 34.49 × 50 =
  35. 35.63 × 5 =
  36. 36.16 × 5 =
  37. 37.30 × 5 =
  38. 38.29 × 50 =
  39. 39.55 × 5 =
  40. 40.67 × 5 =

Answer key

  1. 445
  2. 65
  3. 125
  4. 265
  5. 600
  6. 330
  7. 1650
  8. 215
  9. 120
  10. 315
  11. 1650
  12. 3450
  13. 65
  14. 410
  15. 3450
  16. 365
  17. 175
  18. 160
  19. 3350
  20. 3400
  21. 3050
  22. 420
  23. 4200
  24. 3250
  25. 2500
  26. 325
  27. 175
  28. 4800
  29. 170
  30. 440
  31. 375
  32. 90
  33. 1400
  34. 2450
  35. 315
  36. 80
  37. 150
  38. 1450
  39. 275
  40. 335

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