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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 199 · 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. 1.117 × 4 =
  2. 2.123 × 4 =
  3. 3.40 × 4 =
  4. 4.126 × 4 =
  5. 5.156 × 4 =
  6. 6.53 × 8 =
  7. 7.68 × 8 =
  8. 8.13 × 8 =
  9. 9.154 × 4 =
  10. 10.14 × 8 =
  11. 11.20 × 8 =
  12. 12.46 × 8 =
  13. 13.87 × 4 =
  14. 14.48 × 4 =
  15. 15.82 × 4 =
  16. 16.107 × 4 =
  17. 17.29 × 8 =
  18. 18.55 × 8 =
  19. 19.141 × 4 =
  20. 20.14 × 8 =
  21. 21.32 × 4 =
  22. 22.82 × 4 =
  23. 23.25 × 4 =
  24. 24.46 × 8 =
  25. 25.60 × 4 =
  26. 26.148 × 4 =
  27. 27.36 × 4 =
  28. 28.158 × 4 =
  29. 29.58 × 4 =
  30. 30.142 × 4 =
  31. 31.118 × 4 =
  32. 32.56 × 8 =
  33. 33.38 × 8 =
  34. 34.30 × 8 =
  35. 35.25 × 4 =
  36. 36.12 × 8 =
  37. 37.40 × 8 =
  38. 38.38 × 8 =
  39. 39.157 × 4 =
  40. 40.95 × 4 =

Answer key

  1. 468
  2. 492
  3. 160
  4. 504
  5. 624
  6. 424
  7. 544
  8. 104
  9. 616
  10. 112
  11. 160
  12. 368
  13. 348
  14. 192
  15. 328
  16. 428
  17. 232
  18. 440
  19. 564
  20. 112
  21. 128
  22. 328
  23. 100
  24. 368
  25. 240
  26. 592
  27. 144
  28. 632
  29. 232
  30. 568
  31. 472
  32. 448
  33. 304
  34. 240
  35. 100
  36. 96
  37. 320
  38. 304
  39. 628
  40. 380

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