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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 177 · 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. 1.43 × 8 =
  2. 2.75 × 8 =
  3. 3.108 × 4 =
  4. 4.151 × 4 =
  5. 5.35 × 4 =
  6. 6.127 × 4 =
  7. 7.17 × 8 =
  8. 8.42 × 8 =
  9. 9.40 × 4 =
  10. 10.47 × 4 =
  11. 11.123 × 4 =
  12. 12.58 × 8 =
  13. 13.88 × 4 =
  14. 14.55 × 8 =
  15. 15.148 × 4 =
  16. 16.43 × 8 =
  17. 17.31 × 4 =
  18. 18.35 × 4 =
  19. 19.124 × 4 =
  20. 20.24 × 8 =
  21. 21.71 × 4 =
  22. 22.27 × 8 =
  23. 23.61 × 8 =
  24. 24.23 × 8 =
  25. 25.75 × 8 =
  26. 26.37 × 8 =
  27. 27.58 × 8 =
  28. 28.42 × 8 =
  29. 29.58 × 8 =
  30. 30.140 × 4 =
  31. 31.38 × 8 =
  32. 32.59 × 8 =
  33. 33.18 × 8 =
  34. 34.30 × 8 =
  35. 35.45 × 8 =
  36. 36.19 × 8 =
  37. 37.20 × 4 =
  38. 38.69 × 8 =
  39. 39.125 × 4 =
  40. 40.96 × 4 =

Answer key

  1. 344
  2. 600
  3. 432
  4. 604
  5. 140
  6. 508
  7. 136
  8. 336
  9. 160
  10. 188
  11. 492
  12. 464
  13. 352
  14. 440
  15. 592
  16. 344
  17. 124
  18. 140
  19. 496
  20. 192
  21. 284
  22. 216
  23. 488
  24. 184
  25. 600
  26. 296
  27. 464
  28. 336
  29. 464
  30. 560
  31. 304
  32. 472
  33. 144
  34. 240
  35. 360
  36. 152
  37. 80
  38. 552
  39. 500
  40. 384

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