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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 865 · 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. 1.18 × 4 =
  2. 2.59 × 8 =
  3. 3.89 × 4 =
  4. 4.88 × 4 =
  5. 5.117 × 4 =
  6. 6.138 × 4 =
  7. 7.71 × 4 =
  8. 8.147 × 4 =
  9. 9.53 × 8 =
  10. 10.112 × 4 =
  11. 11.13 × 8 =
  12. 12.37 × 4 =
  13. 13.159 × 4 =
  14. 14.59 × 4 =
  15. 15.31 × 8 =
  16. 16.71 × 8 =
  17. 17.57 × 4 =
  18. 18.20 × 8 =
  19. 19.37 × 8 =
  20. 20.43 × 8 =
  21. 21.24 × 4 =
  22. 22.51 × 4 =
  23. 23.18 × 8 =
  24. 24.56 × 8 =
  25. 25.14 × 8 =
  26. 26.68 × 8 =
  27. 27.44 × 8 =
  28. 28.42 × 4 =
  29. 29.105 × 4 =
  30. 30.61 × 4 =
  31. 31.127 × 4 =
  32. 32.19 × 8 =
  33. 33.65 × 4 =
  34. 34.33 × 8 =
  35. 35.73 × 8 =
  36. 36.42 × 8 =
  37. 37.34 × 4 =
  38. 38.49 × 8 =
  39. 39.61 × 4 =
  40. 40.107 × 4 =

Answer key

  1. 72
  2. 472
  3. 356
  4. 352
  5. 468
  6. 552
  7. 284
  8. 588
  9. 424
  10. 448
  11. 104
  12. 148
  13. 636
  14. 236
  15. 248
  16. 568
  17. 228
  18. 160
  19. 296
  20. 344
  21. 96
  22. 204
  23. 144
  24. 448
  25. 112
  26. 544
  27. 352
  28. 168
  29. 420
  30. 244
  31. 508
  32. 152
  33. 260
  34. 264
  35. 584
  36. 336
  37. 136
  38. 392
  39. 244
  40. 428

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