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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 507 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.55 × 8 =
  2. 2.72 × 8 =
  3. 3.76 × 4 =
  4. 4.58 × 8 =
  5. 5.31 × 8 =
  6. 6.86 × 4 =
  7. 7.68 × 4 =
  8. 8.106 × 4 =
  9. 9.55 × 8 =
  10. 10.136 × 4 =
  11. 11.14 × 4 =
  12. 12.89 × 4 =
  13. 13.41 × 4 =
  14. 14.21 × 4 =
  15. 15.138 × 4 =
  16. 16.45 × 4 =
  17. 17.15 × 8 =
  18. 18.33 × 4 =
  19. 19.65 × 4 =
  20. 20.17 × 8 =
  21. 21.43 × 8 =
  22. 22.74 × 8 =
  23. 23.36 × 4 =
  24. 24.50 × 8 =
  25. 25.47 × 4 =
  26. 26.74 × 4 =
  27. 27.34 × 8 =
  28. 28.24 × 8 =
  29. 29.21 × 8 =
  30. 30.65 × 8 =
  31. 31.87 × 4 =
  32. 32.58 × 8 =
  33. 33.152 × 4 =
  34. 34.52 × 8 =
  35. 35.15 × 4 =
  36. 36.59 × 8 =
  37. 37.58 × 8 =
  38. 38.67 × 8 =
  39. 39.103 × 4 =
  40. 40.136 × 4 =

Answer key

  1. 440
  2. 576
  3. 304
  4. 464
  5. 248
  6. 344
  7. 272
  8. 424
  9. 440
  10. 544
  11. 56
  12. 356
  13. 164
  14. 84
  15. 552
  16. 180
  17. 120
  18. 132
  19. 260
  20. 136
  21. 344
  22. 592
  23. 144
  24. 400
  25. 188
  26. 296
  27. 272
  28. 192
  29. 168
  30. 520
  31. 348
  32. 464
  33. 608
  34. 416
  35. 60
  36. 472
  37. 464
  38. 536
  39. 412
  40. 544

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