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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 304 · 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. 1.31 × 8 =
  2. 2.69 × 4 =
  3. 3.35 × 4 =
  4. 4.48 × 8 =
  5. 5.128 × 4 =
  6. 6.71 × 4 =
  7. 7.29 × 4 =
  8. 8.37 × 4 =
  9. 9.32 × 4 =
  10. 10.27 × 4 =
  11. 11.93 × 4 =
  12. 12.69 × 8 =
  13. 13.45 × 4 =
  14. 14.141 × 4 =
  15. 15.23 × 8 =
  16. 16.15 × 8 =
  17. 17.14 × 8 =
  18. 18.32 × 8 =
  19. 19.58 × 8 =
  20. 20.154 × 4 =
  21. 21.39 × 4 =
  22. 22.66 × 4 =
  23. 23.30 × 8 =
  24. 24.132 × 4 =
  25. 25.16 × 8 =
  26. 26.65 × 4 =
  27. 27.16 × 8 =
  28. 28.113 × 4 =
  29. 29.59 × 4 =
  30. 30.31 × 8 =
  31. 31.13 × 4 =
  32. 32.116 × 4 =
  33. 33.107 × 4 =
  34. 34.87 × 4 =
  35. 35.26 × 8 =
  36. 36.50 × 8 =
  37. 37.32 × 8 =
  38. 38.27 × 8 =
  39. 39.56 × 8 =
  40. 40.37 × 8 =

Answer key

  1. 248
  2. 276
  3. 140
  4. 384
  5. 512
  6. 284
  7. 116
  8. 148
  9. 128
  10. 108
  11. 372
  12. 552
  13. 180
  14. 564
  15. 184
  16. 120
  17. 112
  18. 256
  19. 464
  20. 616
  21. 156
  22. 264
  23. 240
  24. 528
  25. 128
  26. 260
  27. 128
  28. 452
  29. 236
  30. 248
  31. 52
  32. 464
  33. 428
  34. 348
  35. 208
  36. 400
  37. 256
  38. 216
  39. 448
  40. 296

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