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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 75 · 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. 1.52 × 8 =
  2. 2.22 × 8 =
  3. 3.132 × 4 =
  4. 4.31 × 4 =
  5. 5.21 × 4 =
  6. 6.145 × 4 =
  7. 7.63 × 8 =
  8. 8.39 × 8 =
  9. 9.136 × 4 =
  10. 10.140 × 4 =
  11. 11.82 × 4 =
  12. 12.151 × 4 =
  13. 13.106 × 4 =
  14. 14.17 × 8 =
  15. 15.121 × 4 =
  16. 16.37 × 4 =
  17. 17.118 × 4 =
  18. 18.20 × 8 =
  19. 19.68 × 8 =
  20. 20.58 × 4 =
  21. 21.46 × 8 =
  22. 22.26 × 4 =
  23. 23.109 × 4 =
  24. 24.12 × 8 =
  25. 25.77 × 4 =
  26. 26.56 × 4 =
  27. 27.93 × 4 =
  28. 28.115 × 4 =
  29. 29.50 × 8 =
  30. 30.121 × 4 =
  31. 31.24 × 8 =
  32. 32.120 × 4 =
  33. 33.31 × 8 =
  34. 34.43 × 8 =
  35. 35.115 × 4 =
  36. 36.74 × 8 =
  37. 37.66 × 8 =
  38. 38.45 × 8 =
  39. 39.146 × 4 =
  40. 40.79 × 4 =

Answer key

  1. 416
  2. 176
  3. 528
  4. 124
  5. 84
  6. 580
  7. 504
  8. 312
  9. 544
  10. 560
  11. 328
  12. 604
  13. 424
  14. 136
  15. 484
  16. 148
  17. 472
  18. 160
  19. 544
  20. 232
  21. 368
  22. 104
  23. 436
  24. 96
  25. 308
  26. 224
  27. 372
  28. 460
  29. 400
  30. 484
  31. 192
  32. 480
  33. 248
  34. 344
  35. 460
  36. 592
  37. 528
  38. 360
  39. 584
  40. 316

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