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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 612 · 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. 1.16 × 50 =
  2. 2.21 × 5 =
  3. 3.17 × 50 =
  4. 4.45 × 50 =
  5. 5.12 × 50 =
  6. 6.82 × 50 =
  7. 7.24 × 5 =
  8. 8.85 × 50 =
  9. 9.91 × 50 =
  10. 10.33 × 50 =
  11. 11.64 × 5 =
  12. 12.35 × 5 =
  13. 13.41 × 5 =
  14. 14.65 × 5 =
  15. 15.29 × 5 =
  16. 16.53 × 5 =
  17. 17.28 × 5 =
  18. 18.88 × 5 =
  19. 19.85 × 5 =
  20. 20.77 × 5 =
  21. 21.17 × 50 =
  22. 22.52 × 5 =
  23. 23.60 × 50 =
  24. 24.87 × 50 =
  25. 25.30 × 5 =
  26. 26.23 × 5 =
  27. 27.61 × 5 =
  28. 28.62 × 5 =
  29. 29.29 × 5 =
  30. 30.15 × 5 =
  31. 31.47 × 5 =
  32. 32.51 × 50 =
  33. 33.86 × 50 =
  34. 34.31 × 5 =
  35. 35.34 × 50 =
  36. 36.65 × 50 =
  37. 37.36 × 5 =
  38. 38.15 × 50 =
  39. 39.43 × 5 =
  40. 40.67 × 50 =

Answer key

  1. 800
  2. 105
  3. 850
  4. 2250
  5. 600
  6. 4100
  7. 120
  8. 4250
  9. 4550
  10. 1650
  11. 320
  12. 175
  13. 205
  14. 325
  15. 145
  16. 265
  17. 140
  18. 440
  19. 425
  20. 385
  21. 850
  22. 260
  23. 3000
  24. 4350
  25. 150
  26. 115
  27. 305
  28. 310
  29. 145
  30. 75
  31. 235
  32. 2550
  33. 4300
  34. 155
  35. 1700
  36. 3250
  37. 180
  38. 750
  39. 215
  40. 3350

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