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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 23 · 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. 1.94 × 4 =
  2. 2.74 × 8 =
  3. 3.96 × 4 =
  4. 4.57 × 4 =
  5. 5.26 × 4 =
  6. 6.92 × 4 =
  7. 7.65 × 8 =
  8. 8.128 × 4 =
  9. 9.69 × 8 =
  10. 10.37 × 4 =
  11. 11.135 × 4 =
  12. 12.106 × 4 =
  13. 13.51 × 8 =
  14. 14.151 × 4 =
  15. 15.14 × 8 =
  16. 16.69 × 4 =
  17. 17.74 × 8 =
  18. 18.72 × 8 =
  19. 19.73 × 8 =
  20. 20.109 × 4 =
  21. 21.47 × 8 =
  22. 22.72 × 8 =
  23. 23.25 × 4 =
  24. 24.125 × 4 =
  25. 25.112 × 4 =
  26. 26.31 × 4 =
  27. 27.31 × 8 =
  28. 28.52 × 4 =
  29. 29.94 × 4 =
  30. 30.43 × 8 =
  31. 31.137 × 4 =
  32. 32.43 × 8 =
  33. 33.45 × 4 =
  34. 34.73 × 8 =
  35. 35.42 × 4 =
  36. 36.84 × 4 =
  37. 37.69 × 8 =
  38. 38.84 × 4 =
  39. 39.71 × 8 =
  40. 40.113 × 4 =

Answer key

  1. 376
  2. 592
  3. 384
  4. 228
  5. 104
  6. 368
  7. 520
  8. 512
  9. 552
  10. 148
  11. 540
  12. 424
  13. 408
  14. 604
  15. 112
  16. 276
  17. 592
  18. 576
  19. 584
  20. 436
  21. 376
  22. 576
  23. 100
  24. 500
  25. 448
  26. 124
  27. 248
  28. 208
  29. 376
  30. 344
  31. 548
  32. 344
  33. 180
  34. 584
  35. 168
  36. 336
  37. 552
  38. 336
  39. 568
  40. 452

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