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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 958 · 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. 1.67 × 5 =
  2. 2.78 × 5 =
  3. 3.20 × 5 =
  4. 4.16 × 5 =
  5. 5.77 × 5 =
  6. 6.98 × 50 =
  7. 7.64 × 5 =
  8. 8.53 × 50 =
  9. 9.84 × 50 =
  10. 10.30 × 5 =
  11. 11.92 × 50 =
  12. 12.53 × 5 =
  13. 13.23 × 50 =
  14. 14.17 × 5 =
  15. 15.20 × 50 =
  16. 16.50 × 50 =
  17. 17.65 × 50 =
  18. 18.15 × 5 =
  19. 19.24 × 5 =
  20. 20.27 × 50 =
  21. 21.14 × 50 =
  22. 22.19 × 5 =
  23. 23.49 × 5 =
  24. 24.80 × 5 =
  25. 25.63 × 5 =
  26. 26.34 × 50 =
  27. 27.20 × 50 =
  28. 28.96 × 50 =
  29. 29.32 × 5 =
  30. 30.28 × 50 =
  31. 31.71 × 50 =
  32. 32.97 × 5 =
  33. 33.86 × 5 =
  34. 34.63 × 5 =
  35. 35.60 × 5 =
  36. 36.83 × 50 =
  37. 37.53 × 5 =
  38. 38.31 × 5 =
  39. 39.33 × 50 =
  40. 40.91 × 50 =

Answer key

  1. 335
  2. 390
  3. 100
  4. 80
  5. 385
  6. 4900
  7. 320
  8. 2650
  9. 4200
  10. 150
  11. 4600
  12. 265
  13. 1150
  14. 85
  15. 1000
  16. 2500
  17. 3250
  18. 75
  19. 120
  20. 1350
  21. 700
  22. 95
  23. 245
  24. 400
  25. 315
  26. 1700
  27. 1000
  28. 4800
  29. 160
  30. 1400
  31. 3550
  32. 485
  33. 430
  34. 315
  35. 300
  36. 4150
  37. 265
  38. 155
  39. 1650
  40. 4550

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