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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 700 · 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. 1.141 × 4 =
  2. 2.158 × 4 =
  3. 3.48 × 4 =
  4. 4.38 × 8 =
  5. 5.78 × 4 =
  6. 6.52 × 8 =
  7. 7.13 × 4 =
  8. 8.124 × 4 =
  9. 9.142 × 4 =
  10. 10.147 × 4 =
  11. 11.106 × 4 =
  12. 12.105 × 4 =
  13. 13.63 × 4 =
  14. 14.67 × 8 =
  15. 15.35 × 8 =
  16. 16.65 × 8 =
  17. 17.44 × 8 =
  18. 18.17 × 8 =
  19. 19.129 × 4 =
  20. 20.41 × 8 =
  21. 21.69 × 8 =
  22. 22.29 × 8 =
  23. 23.58 × 8 =
  24. 24.69 × 8 =
  25. 25.42 × 8 =
  26. 26.148 × 4 =
  27. 27.46 × 4 =
  28. 28.79 × 4 =
  29. 29.105 × 4 =
  30. 30.148 × 4 =
  31. 31.39 × 8 =
  32. 32.61 × 8 =
  33. 33.20 × 8 =
  34. 34.40 × 8 =
  35. 35.21 × 4 =
  36. 36.21 × 4 =
  37. 37.30 × 8 =
  38. 38.20 × 8 =
  39. 39.54 × 8 =
  40. 40.44 × 8 =

Answer key

  1. 564
  2. 632
  3. 192
  4. 304
  5. 312
  6. 416
  7. 52
  8. 496
  9. 568
  10. 588
  11. 424
  12. 420
  13. 252
  14. 536
  15. 280
  16. 520
  17. 352
  18. 136
  19. 516
  20. 328
  21. 552
  22. 232
  23. 464
  24. 552
  25. 336
  26. 592
  27. 184
  28. 316
  29. 420
  30. 592
  31. 312
  32. 488
  33. 160
  34. 320
  35. 84
  36. 84
  37. 240
  38. 160
  39. 432
  40. 352

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