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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 126 · 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. 1.61 × 8 =
  2. 2.35 × 4 =
  3. 3.33 × 4 =
  4. 4.28 × 4 =
  5. 5.34 × 8 =
  6. 6.116 × 4 =
  7. 7.20 × 8 =
  8. 8.138 × 4 =
  9. 9.41 × 8 =
  10. 10.26 × 8 =
  11. 11.84 × 4 =
  12. 12.46 × 4 =
  13. 13.17 × 8 =
  14. 14.40 × 4 =
  15. 15.85 × 4 =
  16. 16.18 × 8 =
  17. 17.33 × 8 =
  18. 18.18 × 4 =
  19. 19.69 × 4 =
  20. 20.28 × 4 =
  21. 21.152 × 4 =
  22. 22.147 × 4 =
  23. 23.101 × 4 =
  24. 24.24 × 4 =
  25. 25.104 × 4 =
  26. 26.136 × 4 =
  27. 27.99 × 4 =
  28. 28.137 × 4 =
  29. 29.34 × 4 =
  30. 30.58 × 4 =
  31. 31.109 × 4 =
  32. 32.148 × 4 =
  33. 33.62 × 8 =
  34. 34.21 × 8 =
  35. 35.15 × 8 =
  36. 36.105 × 4 =
  37. 37.15 × 8 =
  38. 38.43 × 8 =
  39. 39.51 × 4 =
  40. 40.69 × 8 =

Answer key

  1. 488
  2. 140
  3. 132
  4. 112
  5. 272
  6. 464
  7. 160
  8. 552
  9. 328
  10. 208
  11. 336
  12. 184
  13. 136
  14. 160
  15. 340
  16. 144
  17. 264
  18. 72
  19. 276
  20. 112
  21. 608
  22. 588
  23. 404
  24. 96
  25. 416
  26. 544
  27. 396
  28. 548
  29. 136
  30. 232
  31. 436
  32. 592
  33. 496
  34. 168
  35. 120
  36. 420
  37. 120
  38. 344
  39. 204
  40. 552

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