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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 755 · 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. 1.14 × 4 =
  2. 2.42 × 8 =
  3. 3.63 × 8 =
  4. 4.60 × 8 =
  5. 5.29 × 8 =
  6. 6.64 × 4 =
  7. 7.56 × 8 =
  8. 8.56 × 8 =
  9. 9.73 × 8 =
  10. 10.14 × 8 =
  11. 11.26 × 8 =
  12. 12.50 × 8 =
  13. 13.143 × 4 =
  14. 14.56 × 8 =
  15. 15.13 × 8 =
  16. 16.70 × 8 =
  17. 17.132 × 4 =
  18. 18.22 × 8 =
  19. 19.95 × 4 =
  20. 20.51 × 4 =
  21. 21.54 × 4 =
  22. 22.142 × 4 =
  23. 23.157 × 4 =
  24. 24.37 × 4 =
  25. 25.19 × 8 =
  26. 26.62 × 8 =
  27. 27.96 × 4 =
  28. 28.53 × 8 =
  29. 29.35 × 4 =
  30. 30.23 × 4 =
  31. 31.30 × 8 =
  32. 32.67 × 4 =
  33. 33.47 × 8 =
  34. 34.65 × 4 =
  35. 35.52 × 8 =
  36. 36.71 × 8 =
  37. 37.63 × 8 =
  38. 38.47 × 4 =
  39. 39.30 × 4 =
  40. 40.141 × 4 =

Answer key

  1. 56
  2. 336
  3. 504
  4. 480
  5. 232
  6. 256
  7. 448
  8. 448
  9. 584
  10. 112
  11. 208
  12. 400
  13. 572
  14. 448
  15. 104
  16. 560
  17. 528
  18. 176
  19. 380
  20. 204
  21. 216
  22. 568
  23. 628
  24. 148
  25. 152
  26. 496
  27. 384
  28. 424
  29. 140
  30. 92
  31. 240
  32. 268
  33. 376
  34. 260
  35. 416
  36. 568
  37. 504
  38. 188
  39. 120
  40. 564

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