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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 489 · 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. 1.66 × 4 =
  2. 2.88 × 4 =
  3. 3.33 × 8 =
  4. 4.38 × 4 =
  5. 5.18 × 8 =
  6. 6.109 × 4 =
  7. 7.19 × 8 =
  8. 8.22 × 8 =
  9. 9.34 × 4 =
  10. 10.38 × 8 =
  11. 11.77 × 4 =
  12. 12.136 × 4 =
  13. 13.57 × 4 =
  14. 14.23 × 8 =
  15. 15.140 × 4 =
  16. 16.52 × 4 =
  17. 17.111 × 4 =
  18. 18.26 × 8 =
  19. 19.26 × 4 =
  20. 20.32 × 4 =
  21. 21.121 × 4 =
  22. 22.47 × 4 =
  23. 23.62 × 4 =
  24. 24.47 × 8 =
  25. 25.48 × 4 =
  26. 26.35 × 8 =
  27. 27.140 × 4 =
  28. 28.65 × 8 =
  29. 29.31 × 4 =
  30. 30.122 × 4 =
  31. 31.152 × 4 =
  32. 32.33 × 4 =
  33. 33.68 × 8 =
  34. 34.57 × 8 =
  35. 35.59 × 8 =
  36. 36.137 × 4 =
  37. 37.43 × 8 =
  38. 38.109 × 4 =
  39. 39.118 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 264
  2. 352
  3. 264
  4. 152
  5. 144
  6. 436
  7. 152
  8. 176
  9. 136
  10. 304
  11. 308
  12. 544
  13. 228
  14. 184
  15. 560
  16. 208
  17. 444
  18. 208
  19. 104
  20. 128
  21. 484
  22. 188
  23. 248
  24. 376
  25. 192
  26. 280
  27. 560
  28. 520
  29. 124
  30. 488
  31. 608
  32. 132
  33. 544
  34. 456
  35. 472
  36. 548
  37. 344
  38. 436
  39. 472
  40. 200

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