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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 999 · 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. 1.57 × 5 =
  2. 2.23 × 5 =
  3. 3.33 × 50 =
  4. 4.13 × 50 =
  5. 5.31 × 50 =
  6. 6.63 × 5 =
  7. 7.14 × 50 =
  8. 8.92 × 5 =
  9. 9.72 × 50 =
  10. 10.96 × 50 =
  11. 11.47 × 5 =
  12. 12.15 × 5 =
  13. 13.12 × 5 =
  14. 14.90 × 5 =
  15. 15.13 × 50 =
  16. 16.44 × 5 =
  17. 17.49 × 50 =
  18. 18.80 × 50 =
  19. 19.48 × 5 =
  20. 20.56 × 5 =
  21. 21.82 × 5 =
  22. 22.85 × 50 =
  23. 23.60 × 5 =
  24. 24.67 × 50 =
  25. 25.15 × 50 =
  26. 26.65 × 5 =
  27. 27.75 × 50 =
  28. 28.31 × 50 =
  29. 29.60 × 5 =
  30. 30.39 × 50 =
  31. 31.62 × 50 =
  32. 32.65 × 5 =
  33. 33.55 × 50 =
  34. 34.18 × 50 =
  35. 35.73 × 5 =
  36. 36.37 × 5 =
  37. 37.82 × 50 =
  38. 38.86 × 50 =
  39. 39.28 × 50 =
  40. 40.45 × 5 =

Answer key

  1. 285
  2. 115
  3. 1650
  4. 650
  5. 1550
  6. 315
  7. 700
  8. 460
  9. 3600
  10. 4800
  11. 235
  12. 75
  13. 60
  14. 450
  15. 650
  16. 220
  17. 2450
  18. 4000
  19. 240
  20. 280
  21. 410
  22. 4250
  23. 300
  24. 3350
  25. 750
  26. 325
  27. 3750
  28. 1550
  29. 300
  30. 1950
  31. 3100
  32. 325
  33. 2750
  34. 900
  35. 365
  36. 185
  37. 4100
  38. 4300
  39. 1400
  40. 225

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