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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 157 · 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. 1.48 × 4 =
  2. 2.94 × 4 =
  3. 3.45 × 4 =
  4. 4.105 × 4 =
  5. 5.72 × 8 =
  6. 6.75 × 8 =
  7. 7.20 × 8 =
  8. 8.56 × 8 =
  9. 9.26 × 8 =
  10. 10.44 × 8 =
  11. 11.122 × 4 =
  12. 12.109 × 4 =
  13. 13.73 × 8 =
  14. 14.68 × 8 =
  15. 15.158 × 4 =
  16. 16.43 × 8 =
  17. 17.70 × 8 =
  18. 18.154 × 4 =
  19. 19.160 × 4 =
  20. 20.27 × 8 =
  21. 21.106 × 4 =
  22. 22.68 × 8 =
  23. 23.35 × 8 =
  24. 24.75 × 8 =
  25. 25.64 × 4 =
  26. 26.43 × 4 =
  27. 27.132 × 4 =
  28. 28.29 × 8 =
  29. 29.30 × 8 =
  30. 30.14 × 8 =
  31. 31.124 × 4 =
  32. 32.41 × 4 =
  33. 33.21 × 4 =
  34. 34.47 × 8 =
  35. 35.151 × 4 =
  36. 36.129 × 4 =
  37. 37.22 × 4 =
  38. 38.36 × 8 =
  39. 39.30 × 8 =
  40. 40.31 × 4 =

Answer key

  1. 192
  2. 376
  3. 180
  4. 420
  5. 576
  6. 600
  7. 160
  8. 448
  9. 208
  10. 352
  11. 488
  12. 436
  13. 584
  14. 544
  15. 632
  16. 344
  17. 560
  18. 616
  19. 640
  20. 216
  21. 424
  22. 544
  23. 280
  24. 600
  25. 256
  26. 172
  27. 528
  28. 232
  29. 240
  30. 112
  31. 496
  32. 164
  33. 84
  34. 376
  35. 604
  36. 516
  37. 88
  38. 288
  39. 240
  40. 124

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